ImgWin = "" ;
function OpenWin(img_name, img_width, img_height) 
{
 if (ImgWin.closed == false) {window.ImgWin.close()}
 adj_width = 1 * img_width + 20; adj_height = 1 * img_height + 30;
 if (navigator.appName == "Microsoft Internet Explorer") { adj_width = 1 * img_width + 20; adj_height = 1 * img_height + 30;}
 if (navigator.appName == "Netscape") { adj_width = 1 * img_width + 16; adj_height = 1 * img_height + 16;}
 ImgWin = window.open(img_name,"","resizable=yes,scrollbars=yes,width="+adj_width+",height="+adj_height+",top=175,left=100,")
}