var popWin = "";
// * FORECOLOUR POPUP WINDOW
function popDesc(){

var w = 520, h = 700;

if (document.all) {

   w = document.body.clientWidth;
   h = document.body.clientHeight;
}
else if (document.layers) {
   w = window.innerWidth;
   h = window.innerHeight;
}

var popW = 520, popH = 680;
var leftPos = (w-popW)/2, topPos = (h-popH)/2;

if (popWin != ""){popWin.close()}
popWin = window.open("property_desc.asp","window","toolbar=0,status=0,menubar=0,scrollbars=0,resizable=0,width=" + popW + ",height="+popH+",top="+topPos+",left="+leftPos)
window.opener = self;

}