What's wrong with this code?
Code:
<script language="JavaScript"><!--
if (screen.width = 800){
	if (screen.height = 600){
	document.write "<BR><BR>";
       }
}
if (screen.width = 1024){
	if (screen.height = 768){
	document.write "<BR><BR><BR>";
	}
}
//--></script>