function wow(url,x,y)
{
 var win = launchCenter(url, 'center', x, y);
 //document.write(win);
}

function launchCenter(url, name, height, width) {
  /*if (height=='h' && width=='w')
  {
	  var str = "scrollbars,status,resizable,";
  }*/
  var str = "";
  /*else
	{	
		var str = "status,";
	}*/
  str += "height=" + height + ",innerHeight=" + height;
  str += ",width=" + width + ",innerWidth=" + width;
  if (window.screen) {
    var ah = screen.availHeight - 30;
    var aw = screen.availWidth - 10;

    var xc = (aw - width) / 2;
    var yc = (ah - height) / 2;

    str += ",left=" + xc + ",screenX=" + xc;
    str += ",top=" + yc + ",screenY=" + yc;
  }
   return window.open(url, name, str);
   //return str;
   
}