function popUP(file,width,height,scrolling,name) {
	var    xPos = (screen.availWidth / 2) - (width / 2);
	var    yPos = (screen.availHeight / 2) - (height / 2) - 20;
	eval(name+" = window.open(file,name,'top='+yPos+',left='+xPos+',toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars='+scrolling+',resizable=0,width='+width+',height='+height);");
  }


  function validate_email(string) {
    if (string.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) != -1)
        return true;
    else
        return false;
  }