function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}

function openPopUp(linkURL, width, height) {

	var left=(screen.width)?(screen.width-width)/2:100;
	var top=(screen.height)?(screen.height-height)/2:100;
	win = window.open(linkURL,'popupup','width=' + width + ',height=' + height + ',left=' + left + ',top=' + top);
	win.focus();
}