var theURL1 = 'screenshot.gif';
var theURL2 = 'screenshot2D-2.gif';
var theURL3 = 'screenshot-3d.gif';
var theURL4 = 'screenshot-ana.gif';
var width  = 400;
var height = 250;

function popWindow1() {
newWindow = window.open(theURL1,'newWindow','toolbar=no,menubar=no,resizable=yes,scrollbars=no,status=no,location=no,width='+410+',height='+330);
}
function popWindow2() {
newWindow = window.open(theURL2,'newWindow','toolbar=no,menubar=no,resizable=yes,scrollbars=no,status=no,location=no,width='+310+',height='+480);
}
function popWindow3() {
newWindow = window.open(theURL3,'newWindow','toolbar=no,menubar=no,resizable=yes,scrollbars=no,status=no,location=no,width='+310+',height='+500);
}
function popWindow4() {
newWindow = window.open(theURL4,'newWindow','toolbar=no,menubar=no,resizable=yes,scrollbars=no,status=no,location=no,width='+410+',height='+320);
}