function winopen()
{
	x=window.screen.width;
	x=x/2-300;
	y=window.screen.height;
	y=y/2-200;
	window.open('alierform.php','form','toolbar=0,location=0,scrollbars=no,status=no,directories=no,menubar=no,resize=no,height=400,width=600,left='+x+',top='+y)
}