function popup(url,winname,x,y,scroll){
	var truex=(x*2)-(x-10);
	var truey=(y*2)-(y-32);
	var winl=(screen.availWidth-truex)/2;
	var wint=(screen.availHeight-truey)/2;
	window.open(url,winname,'width='+x+',height='+y+',left='+winl+',top='+wint+',scrollbars='+scroll+',location=no,directories=no,status=no,menubar=no,toolbar=no,resizable=no');
}