var newwindow = ''
		function popitup(url) {
		if (newwindow.location && !newwindow.closed) {
		    newwindow.location.href = url; 
		    newwindow.focus(); } 
		else { 
		    newwindow=window.open(url,'htmlname','left=150,top=150,width=520,height=400,resizable=1');} 
		}
		function tidy() {
		if (newwindow.location && !newwindow.closed) { 
		   newwindow.close(); } 
		}