function changeImage()  {
   view = document.navform.aspect.selectedIndex;
   struct = document.navform.structure.selectedIndex;
   viewval = document.navform.aspect.options[view].value;
   structval = document.navform.structure.options[struct].value;
 	if(viewval=="x"){URL1="../../../images/labs/lubberFhead.jpg"; URL2="";}
        if(viewval=="f"){URL1="../../../images/labs/lubberFhead.jpg"; URL2="";}
           if(viewval == "f" && structval == "a"){URL1="../../../images/labs/zoomFcmpeye.jpg";}
           if(viewval == "f" && structval == "b"){URL1="../../../images/labs/zoomFepi.jpg";}
           if(viewval == "f" && structval == "c"){URL1="../../../images/labs/zoomFclyp.jpg";}
		   if(viewval == "f" && structval == "d"){URL1="../../../images/labs/zoomFanten.jpg";}
		   if(viewval == "f" && structval == "e"){URL1="../../../images/labs/zoomFfrons.jpg";}
		   if(viewval == "f" && structval == "f"){URL1="../../../images/labs/zoomFfrontals.jpg";}
           if(viewval == "f" && structval == "g"){URL1="../../../images/labs/zoomFgena.jpg";}
		   if(viewval == "f" && structval == "h"){URL1="../../../images/labs/zoomFlabrum.jpg";}
		   if(viewval == "f" && structval == "i"){URL1="../../../images/labs/zoomFocell.jpg";}
	if(viewval=="s"){URL1="../../../images/labs/lubberShead.jpg"; URL2="";}
           if(viewval == "s" && structval == "a"){URL1="../../../images/labs/zoomScmpeye.jpg";}
           if(viewval == "s" && structval == "b"){URL1="../../../images/labs/zoomSepi.jpg";}
           if(viewval == "s" && structval == "c"){URL1="../../../images/labs/zoomSclyp.jpg";}
		   if(viewval == "s" && structval == "d"){URL1="../../../images/labs/zoomSanten.jpg";}
		   if(viewval == "s" && structval == "e"){URL1="../../../images/labs/zoomScervscler.jpg";}
		   if(viewval == "s" && structval == "f"){URL1="../../../images/labs/zoomSgena.jpg";}
           if(viewval == "s" && structval == "g"){URL1="../../../images/labs/zoomSmthpts.jpg";}
		   if(viewval == "s" && structval == "h"){URL1="../../../images/labs/zoomSvertex.jpg";}
		   if(viewval == "s" && structval == "i"){URL1="../../../images/labs/zoomSocell.jpg";}
	if(viewval=="r"){URL1="../../../images/labs/lubberRhead.jpg"; URL2="";}
           if(viewval == "r" && structval == "a"){URL1="../../../images/labs/zoomRforamen.jpg";}
           if(viewval == "r" && structval == "b"){URL1="../../../images/labs/zoomRtent.jpg";}
           if(viewval == "r" && structval == "c"){URL1="../../../images/labs/zoomRocciput.jpg";}
		   if(viewval == "r" && structval == "d"){URL1="../../../images/labs/zoomRcoron.jpg";}
		   if(viewval == "r" && structval == "e"){URL1="../../../images/labs/zoomRmaxill.jpg";}
		   if(viewval == "r" && structval == "f"){URL1="../../../images/labs/zoomRlabium.jpg";}
           if(viewval == "r" && structval == "g"){URL1="../../../images/labs/lubberRhead.jpg";}
		   if(viewval == "r" && structval == "h"){URL1="../../../images/labs/lubberRhead.jpg";}
		   if(viewval == "r" && structval == "i"){URL1="../../../images/labs/lubberRhead.jpg";}
	  document.images['lab_headstructure'].src=URL1;
}

function changeImage2()  {
   view = document.navform2.aspect.selectedIndex;
   struct = document.navform2.structure.selectedIndex;
   viewval = document.navform2.aspect.options[view].value;
   structval = document.navform2.structure.options[struct].value;
 	if(viewval=="x"){URL1="../../../images/labs/lubberSbody.jpg"; URL2="";}
        if(viewval=="p"){URL1="../../../images/labs/lubberSbody.jpg"; URL2="";}
           if(viewval == "p" && structval == "a"){URL1="../../../images/labs/zoompronotum.jpg";}
           if(viewval == "p" && structval == "b"){URL1="../../../images/labs/zoompropleur.jpg";}
           if(viewval == "p" && structval == "c"){URL1="../../../images/labs/zoomprostern.jpg";}
	   if(viewval == "p" && structval == "d"){URL1="../../../images/labs/lubberSbody.jpg";}
	   if(viewval == "p" && structval == "e"){URL1="../../../images/labs/lubberSbody.jpg";}
	   if(viewval == "p" && structval == "f"){URL1="../../../images/labs/lubberSbody.jpg";}
           if(viewval == "p" && structval == "g"){URL1="../../../images/labs/lubberSbody.jpg";}
	   if(viewval == "p" && structval == "h"){URL1="../../../images/labs/lubberSbody.jpg";}
	if(viewval=="t"){URL1="../../../images/labs/lubberSbody.jpg"; URL2="";}
           if(viewval == "t" && structval == "a"){URL1="../../../images/labs/zoomnota.jpg";}
           if(viewval == "t" && structval == "b"){URL1="../../../images/labs/zoomsterna.jpg";}
           if(viewval == "t" && structval == "c"){URL1="../../../images/labs/zoomplscl.jpg";}
	   if(viewval == "t" && structval == "d"){URL1="../../../images/labs/zoomplsut.jpg";}
	   if(viewval == "t" && structval == "e"){URL1="../../../images/labs/zoomspirac.jpg";}
	   if(viewval == "t" && structval == "f"){URL1="../../../images/labs/zoompits.jpg";}
           if(viewval == "t" && structval == "g"){URL1="../../../images/labs/zoomsterncost.jpg";}
	   if(viewval == "t" && structval == "h"){URL1="../../../images/labs/zoomfurca.jpg";}
	if(viewval=="a"){URL1="../../../images/labs/lubberSbody.jpg"; URL2="";}
           if(viewval == "a" && structval == "a"){URL1="../../../images/labs/zoomtergite.jpg";}
           if(viewval == "a" && structval == "b"){URL1="../../../images/labs/zoomsternite.jpg";}
           if(viewval == "a" && structval == "c"){URL1="../../../images/labs/zoomtymp.jpg";}
	   if(viewval == "a" && structval == "d"){URL1="../../../images/labs/zoomcerci.jpg";}
	   if(viewval == "a" && structval == "e"){URL1="../../../images/labs/zoomepiproct.jpg";}
	   if(viewval == "a" && structval == "f"){URL1="../../../images/labs/zoomparaproct.jpg";}
           if(viewval == "a" && structval == "g"){URL1="../../../images/labs/zoomsubgen.jpg";}
	   if(viewval == "a" && structval == "h"){URL1="../../../images/labs/zoomovipos.jpg";}
	  document.images['thorab'].src=URL1;
}


function changeAntenna(val)   {
   if(val == 1){URL="../../../images/labs/filiform01.jpg";}
   if(val == 2){URL="../../../images/labs/moniliform01.jpg";}
   if(val == 3){URL="../../../images/labs/serrate01.jpg";}
   if(val == 4){URL="../../../images/labs/setaceous01.jpg";}
   if(val == 5){URL="../../../images/labs/lamellate01.jpg";}
   if(val == 6){URL="../../../images/labs/pectinate01.jpg";}
   if(val == 7){URL="../../../images/labs/plumose01.jpg";}
   if(val == 8){URL="../../../images/labs/clavate01.jpg";}
   if(val == 9){URL="../../../images/labs/capitate01.jpg";}
   if(val == 10){URL="../../../images/labs/aristate01.jpg";}
   if(val == 11){URL="../../../images/labs/all_antennae.jpg";}
        document.images['antenna_type'].src=URL;
}

function changeLubber(val)
   {
	if(val==0){imageURL="../../../images/labs/lubberside00.jpg";}; 
	if(val==1){imageURL="../../../images/labs/lubberside01.jpg";}; 
	if(val==2){imageURL="../../../images/labs/lubberside02.jpg";}; 
	if(val==3){imageURL="../../../images/labs/lubberside03.jpg";}; 
	if(val==4){imageURL="../../../images/labs/lubberside04.jpg";}; 
	if(val==5){imageURL="../../../images/labs/lubberside05.jpg";}; 
	if(val==6){imageURL="../../../images/labs/lubberside06.jpg";}; 
	if(val==7){imageURL="../../../images/labs/lubberside07.jpg";}; 
	if(val==8){imageURL="../../../images/labs/lubberside08.jpg";}; 

	  document.images['lubberside'].src=imageURL;
   }

function changeLegs(val)
   {
	if(val==0){imageURL="../../../images/labs/legs0962.jpg";}; 
	if(val==1){imageURL="../../../images/labs/legs0962a.jpg";}; 
	if(val==2){imageURL="../../../images/labs/legs0962b.jpg";}; 
	if(val==3){imageURL="../../../images/labs/legs0962c.jpg";}; 
	if(val==4){imageURL="../../../images/labs/legs0962d.jpg";}; 
	if(val==5){imageURL="../../../images/labs/legs0962e.jpg";}; 

	  document.images['lubberlegs'].src=imageURL;
   }

function changeLegMods(val)
   {
	if(val==0){imageURL="../../../images/labs/cursorial.jpg";}; 
	if(val==1){imageURL="../../../images/labs/saltatorial.jpg";}; 
	if(val==2){imageURL="../../../images/labs/raptorial.jpg";}; 
	if(val==3){imageURL="../../../images/labs/fossorial.jpg";}; 
	if(val==4){imageURL="../../../images/labs/natatorial.jpg";}; 

	  document.images['legmods'].src=imageURL;
   }

function changeVeins(val)
   {
	if(val==0){imageURL="../../../images/labs/wing_veins.gif";}; 
	if(val==1){imageURL="../../../images/labs/costa.gif";}; 
	if(val==2){imageURL="../../../images/labs/subcosta.gif";}; 
	if(val==3){imageURL="../../../images/labs/radius.gif";}; 
	if(val==4){imageURL="../../../images/labs/media.gif";}; 
	if(val==5){imageURL="../../../images/labs/cubitus.gif";}; 
	if(val==6){imageURL="../../../images/labs/anal.gif";}; 
	if(val==7){imageURL="../../../images/labs/humeral.gif";}; 
	if(val==8){imageURL="../../../images/labs/radial.gif";}; 
	if(val==9){imageURL="../../../images/labs/sectorial.gif";}; 
	if(val==10){imageURL="../../../images/labs/rad-med.gif";}; 
	if(val==11){imageURL="../../../images/labs/medial.gif";}; 
	if(val==12){imageURL="../../../images/labs/med-cub.gif";}; 
	if(val==13){imageURL="../../../images/labs/cub-anal.gif";}; 	
	
	  document.images['wingveins'].src=imageURL;
   }

function changeWingMods(val)
   {
	if(val==0){imageURL="../../../images/labs/tegmen01.jpg";}; 
	if(val==1){imageURL="../../../images/labs/elytra01.jpg";}; 
	if(val==2){imageURL="../../../images/labs/hemelytra01.jpg";}; 
	if(val==3){imageURL="../../../images/labs/halteres1041b.jpg";}; 
	if(val==4){imageURL="../../../images/labs/honeybee02.jpg";}; 
	if(val==5){imageURL="../../../images/labs/frenulum01a.jpg";}; 
	if(val==6){imageURL="../../../images/labs/tegmen02.jpg";}; 
	if(val==7){imageURL="../../../images/labs/elytra02.jpg";}; 
	if(val==8){imageURL="../../../images/labs/hemelytra02.jpg";}; 
	if(val==9){imageURL="../../../images/labs/halteres1041a.jpg";}; 
	if(val==10){imageURL="../../../images/labs/hamuli02.jpg";}; 
	if(val==11){imageURL="../../../images/labs/frenulum02a.jpg";}; 
	
	  document.images['wingmods'].src=imageURL;
   }


function navigate() {
   view = document.navform.aspect.selectedIndex;
   struct = document.navform.structure.selectedIndex;
   viewval = document.navform.aspect.options[view].value;
   structval = document.navform.structure.options[struct].value;
  
        if(viewval == "x"){URL1="../../../images/labs/lubberFhead.jpg"; URL2="../../../images/labs/txtbox.gif";};
        if(viewval == "f"){URL1="../../../images/labs/lubberFhead.jpg"; URL2="../../../images/labs/txtbox.gif";};
           if(viewval == "f" && structval == "a"){URL1="../../../images/labs/lubberFcmpeye.jpg"; URL2="../../../images/labs/txt_cmpeye.gif";};
           if(viewval == "f" && structval == "b"){URL1="../../../images/labs/lubberFepi.jpg"; URL2="../../../images/labs/txt_epi.gif";};
           if(viewval == "f" && structval == "c"){URL1="../../../images/labs/lubberFclyp.jpg"; URL2="../../../images/labs/txt_clyp.gif";};
           if(viewval == "f" && structval == "d"){URL1="../../../images/labs/lubberFanten.jpg"; URL2="../../../images/labs/txt_anten.gif";};
           if(viewval == "f" && structval == "e"){URL1="../../../images/labs/lubberFfrons.jpg"; URL2="../../../images/labs/txt_frons.gif";};
		   if(viewval == "f" && structval == "f"){URL1="../../../images/labs/lubberFfrontals.jpg"; URL2="../../../images/labs/txt_frontals.gif";};
           if(viewval == "f" && structval == "g"){URL1="../../../images/labs/lubberFgena.jpg"; URL2="../../../images/labs/txt_gena.gif";};
           if(viewval == "f" && structval == "h"){URL1="../../../images/labs/lubberFlabrum.jpg"; URL2="../../../images/labs/txt_labrum.gif";};
           if(viewval == "f" && structval == "i"){URL1="../../../images/labs/lubberFocell.jpg"; URL2="../../../images/labs/txt_ocell.gif";};
		   	  
	if(viewval == "s"){URL1="../../../images/labs/lubberShead.jpg"; URL2="../../../images/labs/txtbox.gif";};
           if(viewval == "s" && structval == "a"){URL1="../../../images/labs/lubberScmpeye.jpg"; URL2="../../../images/labs/txt_cmpeye.gif";};
           if(viewval == "s" && structval == "b"){URL1="../../../images/labs/lubberSepi.jpg"; URL2="../../../images/labs/txt_epi.gif";};
           if(viewval == "s" && structval == "c"){URL1="../../../images/labs/lubberSclyp.jpg"; URL2="../../../images/labs/txt_clyp.gif";};
		   if(viewval == "s" && structval == "d"){URL1="../../../images/labs/lubberSanten.jpg"; URL2="../../../images/labs/txt_anten.gif";};
		   if(viewval == "s" && structval == "e"){URL1="../../../images/labs/lubberScervscler.jpg"; URL2="../../../images/labs/txt_cervscler.gif";};
		   if(viewval == "s" && structval == "f"){URL1="../../../images/labs/lubberSgena.jpg"; URL2="../../../images/labs/txt_gena.gif";};
           if(viewval == "s" && structval == "g"){URL1="../../../images/labs/lubberSmthpts.jpg"; URL2="../../../images/labs/txt_mthpts.gif";};
		   if(viewval == "s" && structval == "h"){URL1="../../../images/labs/lubberSvertex.jpg"; URL2="../../../images/labs/txt_vertex.gif";};
		   if(viewval == "s" && structval == "i"){URL1="../../../images/labs/lubberSocell.jpg"; URL2="../../../images/labs/txt_ocell.gif";};
		  		   
	if(viewval == "r"){URL1="../../../images/labs/lubberRhead.jpg"; URL2="../../../images/labs/txtbox.gif";};
           if(viewval == "r" && structval == "a"){URL1="../../../images/labs/lubberRforamen.jpg"; URL2="../../../images/labs/txt_foramen.gif";};
           if(viewval == "r" && structval == "b"){URL1="../../../images/labs/lubberRtent.jpg"; URL2="../../../images/labs/txt_tent.gif";};
           if(viewval == "r" && structval == "c"){URL1="../../../images/labs/lubberRocciput.jpg"; URL2="../../../images/labs/txt_occiput.gif";};
		   if(viewval == "r" && structval == "d"){URL1="../../../images/labs/lubberRcoron.jpg"; URL2="../../../images/labs/txt_coron.gif";};
		   if(viewval == "r" && structval == "e"){URL1="../../../images/labs/lubberRmaxill.jpg"; URL2="../../../images/labs/txt_maxill.gif";};
		   if(viewval == "r" && structval == "f"){URL1="../../../images/labs/lubberRlabium.jpg"; URL2="../../../images/labs/txt_labium.gif";};
           if(viewval == "r" && structval == "g"){URL1="../../../images/labs/lubberRhead.jpg"; URL2="../../../images/labs/txtbox.gif";};
		   if(viewval == "r" && structval == "h"){URL1="../../../images/labs/lubberRhead.jpg"; URL2="../../../images/labs/txtbox.gif";};
		   if(viewval == "r" && structval == "i"){URL1="../../../images/labs/lubberRhead.jpg"; URL2="../../../images/labs/txtbox.gif";};
		   
			document.images['lab_headstructure'].src=URL1;	
          document.images['head_text'].src=URL2;
}


function navigate2() {
   view = document.navform2.aspect.selectedIndex;
   struct = document.navform2.structure.selectedIndex;
   viewval = document.navform2.aspect.options[view].value;
   structval = document.navform2.structure.options[struct].value;
  
        if(viewval == "x"){URL1="../../../images/labs/lubberSbody.jpg"; URL2="../../../images/labs/txtbox02.gif";};
        if(viewval == "p"){URL1="../../../images/labs/lubberSbody.jpg"; URL2="../../../images/labs/txt_prothor.gif";};
           if(viewval == "p" && structval == "a"){URL1="../../../images/labs/pronotum.jpg"; URL2="../../../images/labs/txt_pronot.gif";};
           if(viewval == "p" && structval == "b"){URL1="../../../images/labs/propleuron.jpg"; URL2="../../../images/labs/txt_propleur.gif";};
           if(viewval == "p" && structval == "c"){URL1="../../../images/labs/prosternum.jpg"; URL2="../../../images/labs/txt_prostern.gif";};
           if(viewval == "p" && structval == "d"){URL1="../../../images/labs/lubberSbody.jpg"; URL2="../../../images/labs/txtbox02.gif";};
           if(viewval == "p" && structval == "e"){URL1="../../../images/labs/lubberSbody.jpg"; URL2="../../../images/labs/txtbox02.gif";};
	   if(viewval == "p" && structval == "f"){URL1="../../../images/labs/lubberSbody.jpg"; URL2="../../../images/labs/txtbox02.gif";};
           if(viewval == "p" && structval == "g"){URL1="../../../images/labs/lubberSbody.jpg"; URL2="../../../images/labs/txtbox02.gif";};
           if(viewval == "p" && structval == "h"){URL1="../../../images/labs/lubberSbody.jpg"; URL2="../../../images/labs/txtbox02.gif";};
	   	  
	if(viewval == "t"){URL1="../../../images/labs/lubberSbody.jpg"; URL2="../../../images/labs/txt_meso.gif";};
           if(viewval == "t" && structval == "a"){URL1="../../../images/labs/nota.jpg"; URL2="../../../images/labs/txt_thor_nota.gif";};
           if(viewval == "t" && structval == "b"){URL1="../../../images/labs/sterna.jpg"; URL2="../../../images/labs/txt_thor_sterna.gif";};
           if(viewval == "t" && structval == "c"){URL1="../../../images/labs/pleurscl.jpg"; URL2="../../../images/labs/txt_pleur_scler.gif";};
	   if(viewval == "t" && structval == "d"){URL1="../../../images/labs/pleursut.jpg"; URL2="../../../images/labs/txt_pleur_suture.gif";};
	   if(viewval == "t" && structval == "e"){URL1="../../../images/labs/spiracles.jpg"; URL2="../../../images/labs/txt_spiracle.gif";};
	   if(viewval == "t" && structval == "f"){URL1="../../../images/labs/furcalpits.jpg"; URL2="../../../images/labs/txt_furcal.gif";};
           if(viewval == "t" && structval == "g"){URL1="../../../images/labs/sternacostal.jpg"; URL2="../../../images/labs/txt_sternacost.gif";};
	   if(viewval == "t" && structval == "h"){URL1="../../../images/labs/furca01.jpg"; URL2="../../../images/labs/txt_furca.gif";};
		  		   
	if(viewval == "a"){URL1="../../../images/labs/lubberSbody.jpg"; URL2="../../../images/labs/txt_abdomen.gif";};
           if(viewval == "a" && structval == "a"){URL1="../../../images/labs/tergites.jpg"; URL2="../../../images/labs/txt_notum.gif";};
           if(viewval == "a" && structval == "b"){URL1="../../../images/labs/sternites.jpg"; URL2="../../../images/labs/txt_sternite.gif";};
           if(viewval == "a" && structval == "c"){URL1="../../../images/labs/tympanum.jpg"; URL2="../../../images/labs/txt_tympanum.gif";};
	   if(viewval == "a" && structval == "d"){URL1="../../../images/labs/cerci.jpg"; URL2="../../../images/labs/txt_cerci.gif";};
	   if(viewval == "a" && structval == "e"){URL1="../../../images/labs/epiproct.jpg"; URL2="../../../images/labs/txt_epiproct.gif";};
	   if(viewval == "a" && structval == "f"){URL1="../../../images/labs/paraprocts.jpg"; URL2="../../../images/labs/txt_paraproct.gif";};
           if(viewval == "a" && structval == "g"){URL1="../../../images/labs/subgenital.jpg"; URL2="../../../images/labs/txt_subgenital.gif";};
	   if(viewval == "a" && structval == "h"){URL1="../../../images/labs/ovipositor.jpg"; URL2="../../../images/labs/txt_ovipositor.gif";};
		   
			document.images['thorab'].src=URL1;	
          document.images['thorab_text'].src=URL2;
}


function update() {
// update visible structures depending on view
   view = document.navform.aspect.selectedIndex;
   viewval = document.navform.aspect.options[view].value;
   if (viewval == "x")
      {document.navform.structure.options[0].text = "Select a Structure:";
       document.navform.structure.options[0].value = "x";
       document.navform.structure.options[1].text = "(please select ";
       document.navform.structure.options[1].value = "x";
       document.navform.structure.options[2].text = " a view first)";
       document.navform.structure.options[2].value = "x";
       document.navform.structure.options[3].text = " ";
       document.navform.structure.options[3].value = "x";
	   document.navform.structure.options[4].text = " ";
       document.navform.structure.options[4].value = "x";
	   document.navform.structure.options[5].text = " ";
       document.navform.structure.options[5].value = "x";
	   document.navform.structure.options[6].text = " ";
       document.navform.structure.options[6].value = "x";
	   document.navform.structure.options[7].text = " ";
       document.navform.structure.options[7].value = "x";
	   document.navform.structure.options[8].text = " ";
       document.navform.structure.options[8].value = "x";
	   document.navform.structure.options[9].text = " ";
       document.navform.structure.options[9].value = "x";
      }
   if (viewval == "f")
      {document.navform.structure.options[0].text = "Select a Structure:";
       document.navform.structure.options[0].value = "x";
       document.navform.structure.options[1].text = "Compound Eye";
       document.navform.structure.options[1].value = "a";
       document.navform.structure.options[2].text = "Epistomal Suture";
       document.navform.structure.options[2].value = "b";
       document.navform.structure.options[3].text = "Clypeus";
       document.navform.structure.options[3].value = "c";
	   document.navform.structure.options[4].text = "Antennae";
       document.navform.structure.options[4].value = "d";       
	   document.navform.structure.options[5].text = "Frons";
       document.navform.structure.options[5].value = "e";
	   document.navform.structure.options[6].text = "Frontal Sutures";
       document.navform.structure.options[6].value = "f";
	   document.navform.structure.options[7].text = "Genae";
       document.navform.structure.options[7].value = "g";
	   document.navform.structure.options[8].text = "Labrum";
       document.navform.structure.options[8].value = "h";
	   document.navform.structure.options[9].text = "Ocelli";
       document.navform.structure.options[9].value = "i";
      }
   if (viewval == "s")
      {document.navform.structure.options[0].text = "Select a Structure:";
       document.navform.structure.options[0].value = "x";
       document.navform.structure.options[1].text = "Compound Eye";
       document.navform.structure.options[1].value = "a";
       document.navform.structure.options[2].text = "Epistomal Suture";
       document.navform.structure.options[2].value = "b";
       document.navform.structure.options[3].text = "Clypeus";
       document.navform.structure.options[3].value = "c";
	   document.navform.structure.options[4].text = "Antenna";
       document.navform.structure.options[4].value = "d";       
	   document.navform.structure.options[5].text = "Cervical Sclerites";
       document.navform.structure.options[5].value = "e";
	   document.navform.structure.options[6].text = "Gena";
       document.navform.structure.options[6].value = "f";
	   document.navform.structure.options[7].text = "Mouthparts";
       document.navform.structure.options[7].value = "g";
	   document.navform.structure.options[8].text = "Vertex";
       document.navform.structure.options[8].value = "h";
	   document.navform.structure.options[9].text = "Ocellus";
       document.navform.structure.options[9].value = "i";
	   
      }
   if (viewval == "r")
      {document.navform.structure.options[0].text = "Select a Structure:";
       document.navform.structure.options[0].value = "x";
       document.navform.structure.options[1].text = "Foramen magnum";
       document.navform.structure.options[1].value = "a";
       document.navform.structure.options[2].text = "Tentorium";
       document.navform.structure.options[2].value = "b";
       document.navform.structure.options[3].text = "Occiput";
       document.navform.structure.options[3].value = "c";
	   document.navform.structure.options[4].text = "Coronal Suture";
       document.navform.structure.options[4].value = "d";       
	   document.navform.structure.options[5].text = "Maxillae";
       document.navform.structure.options[5].value = "e";
	   document.navform.structure.options[6].text = "Labium";
       document.navform.structure.options[6].value = "f";
	   document.navform.structure.options[7].text = " ";
       document.navform.structure.options[7].value = "g";
	   document.navform.structure.options[8].text = " ";
       document.navform.structure.options[8].value = "h";
	   document.navform.structure.options[9].text = " ";
       document.navform.structure.options[9].value = "i";
      }
}


function update2() {
// update visible structures depending on view
   view = document.navform2.aspect.selectedIndex;
   viewval = document.navform2.aspect.options[view].value;
   if (viewval == "x")
      {document.navform2.structure.options[0].text = "Select a Structure:";
       document.navform2.structure.options[0].value = "x";
       document.navform2.structure.options[1].text = "(please select ";
       document.navform2.structure.options[1].value = "x";
	   document.navform2.structure.options[2].text = " a region first)";
           document.navform2.structure.options[2].value = "x";
       document.navform2.structure.options[3].text = " ";
       document.navform2.structure.options[3].value = "x";
	   document.navform2.structure.options[4].text = " ";
           document.navform2.structure.options[4].value = "x";
       document.navform2.structure.options[5].text = " ";
       document.navform2.structure.options[5].value = "x";
	   document.navform2.structure.options[6].text = " ";
           document.navform2.structure.options[6].value = "x";
       document.navform2.structure.options[7].text = " ";
       document.navform2.structure.options[7].value = "x";
	   document.navform2.structure.options[8].text = " ";
           document.navform2.structure.options[8].value = "x";
      }
   if (viewval == "p")
      {document.navform2.structure.options[0].text = "Select a Structure:";
       document.navform2.structure.options[0].value = "x";
           document.navform2.structure.options[1].text = "Pronotum";
           document.navform2.structure.options[1].value = "a";
       document.navform2.structure.options[2].text = "Propleuron";
       document.navform2.structure.options[2].value = "b";
           document.navform2.structure.options[3].text = "Prosternum";
           document.navform2.structure.options[3].value = "c";
       document.navform2.structure.options[4].text = " ";
       document.navform2.structure.options[4].value = "d";       
	   document.navform2.structure.options[5].text = " ";
           document.navform2.structure.options[5].value = "e";
       document.navform2.structure.options[6].text = " ";
       document.navform2.structure.options[6].value = "f";
	   document.navform2.structure.options[7].text = " ";
           document.navform2.structure.options[7].value = "g";
       document.navform2.structure.options[8].text = " ";
       document.navform2.structure.options[8].value = "h";
      }
   if (viewval == "t")
      {document.navform2.structure.options[0].text = "Select a Structure:";
       document.navform2.structure.options[0].value = "x";
           document.navform2.structure.options[1].text = "Notum";
           document.navform2.structure.options[1].value = "a";
       document.navform2.structure.options[2].text = "Sternum";
       document.navform2.structure.options[2].value = "b";
           document.navform2.structure.options[3].text = "Pleural sclerites";
           document.navform2.structure.options[3].value = "c";
       document.navform2.structure.options[4].text = "Pleural sutures";
       document.navform2.structure.options[4].value = "d";       
	   document.navform2.structure.options[5].text = "Spiracles";
           document.navform2.structure.options[5].value = "e";
       document.navform2.structure.options[6].text = "Furcal pits";
       document.navform2.structure.options[6].value = "f";
	   document.navform2.structure.options[7].text = "Sternacostal suture";
           document.navform2.structure.options[7].value = "g";
       document.navform2.structure.options[8].text = "Furca";
       document.navform2.structure.options[8].value = "h";
      }
   if (viewval == "a")
      {document.navform2.structure.options[0].text = "Select a Structure:";
       document.navform2.structure.options[0].value = "x";
           document.navform2.structure.options[1].text = "Tergites";
           document.navform2.structure.options[1].value = "a";
       document.navform2.structure.options[2].text = "Sternites";
       document.navform2.structure.options[2].value = "b";
           document.navform2.structure.options[3].text = "Tympanum";
           document.navform2.structure.options[3].value = "c";
       document.navform2.structure.options[4].text = "Cerci";
       document.navform2.structure.options[4].value = "d";       
	   document.navform2.structure.options[5].text = "Epiproct";
           document.navform2.structure.options[5].value = "e";
       document.navform2.structure.options[6].text = "Paraproct";
       document.navform2.structure.options[6].value = "f";
	   document.navform2.structure.options[7].text = "Subgenital plate";
           document.navform2.structure.options[7].value = "g";
       document.navform2.structure.options[8].text = "Ovipositor";
       document.navform2.structure.options[8].value = "h";
      }
}