function imgwin(Imgn,Cap_str) // get width of large image that was pre loaded above
{
img_w=eval(Imgn+".width")
if(img_w<100)
{img_w=100}
img_w=img_w+40
img_h=eval(Imgn+".height") // get height of large image that was pre loaded above
if(img_h<100) // cannot open window less than 100 by 100 pixels
{img_h=100}
img_h=img_h+100
picgif=eval(Imgn+".src") // build image source
if(ImgWin.open) // if the window is open close it
{ImgWin.close()}
if (window.screen)
{
var avht = screen.availHeight - 30;
var avwd = screen.availWidth - 10;
var xcen = (avwd - img_w) / 2;
var ycen = (avht - img_h) / 2;
var args = ",left=" + xcen + ",screenX=" + xcen;
args += ",top=" + ycen + ",screenY=" + ycen + ",resizable=yes";
}
WinProps="width="+img_w+",height="+img_h+",location=no,status=no,directories=no,toolbar=no,scrollbars=no,menubar=no,resize=no,"+args
ImgWin=window.open("","winimg",config=WinProps);
ImgWin.document.write("")
ImgWin.document.write("Large Image View")
ImgWin.document.write("")
ImgWin.document.write("")
ImgWin.document.write("