function openWindow(url, width, height, scroll){  
  var  y=((window.screen.availHeight-height)/2);  
  var  x=((window.screen.availWidth-width)/2);  
  window.open(url, "", "height=" + height + ", width=" + width + ", toolbar =no, menubar=no, scrollbars=" + scroll + ", resizable=no, location=no, status=no, top=" + y + ", left=" + x + "");
}


function closeOpenWindow(){
  opener.location.reload();
  self.close();
}

function Ajax_GetXMLHttpRequest() {
	if (window.ActiveXObject) {
		return new ActiveXObject("Microsoft.XMLHTTP");
	} 
	else if (window.XMLHttpRequest) {
		return new XMLHttpRequest();
	}
}

function addOption(objSelectNow,txt,val)
 {
  /// 使用W3C标准语法为SELECT添加Option
  var objOption = document.createElement("OPTION");
  objOption.text= txt;
  objOption.value=val;
  objSelectNow.options.add(objOption);
 }
 function addOptionGroup(selectId,optGroupString)
 {
  var optGroup = optGroupString.split(",");

  var objSelect = document.getElementsByTagName("SELECT");
  var objSelectNow = objSelect[selectId];
  objSelectNow.length = 1;
     /// 成组添加Options
  for (i=1; i<optGroup.length; i++)
  {
   addOption(objSelectNow, optGroup[i], i);
  }
 }