var wi = screen.width;
var hi = screen.height;
var w = 600;
var h = 600;
var Left = (wi-w)/2;
var Top = (hi-h)/2;

function Contact() {
   	 window.open("comment.php",'CONTACT','toolbar=no,location=no,status=no,menubar=no,scrollbars=no,resizable=no,width='+w+',height='+h+',top='+Top+',left='+Left+'')
}

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}