var F1;

function dopopup(url, name, nwidth, nheight, scrollbars) 
{
	F1=open(url,name,"left="+(screen.width-nwidth)/2+",top="+(screen.height-nheight)/2+",width="+nwidth+", height="+nheight+", menubar=no, locationbar=no, scrollbars="+scrollbars+", resizable=no, status=no")
	F1.focus();
}