var newwindow = ''

function popitup(url,width,height) {
	if (newwindow.location && !newwindow.closed) {
	    newwindow.location.href = url; 
	    newwindow.focus(); } 
	else { 
	    newwindow=window.open(url,'htmlname','width=' + (width+40) + ',height=' + (height+40) + ',resizable=1');} 
}

function tidy() {
	if (newwindow.location && !newwindow.closed) { 
	   newwindow.close(); } 
}