function SaveCache(){
   //设置缓存过期时间//
    var oTimeNow = new Date();
   oTimeNow.setMinutes(oTimeNow.getMinutes() + 1);
   var sExpirationDate = oTimeNow.toUTCString();
   
　 var listData=document.getElementById("List")  
   listData.expires=sExpirationDate;
   listData.setAttribute("listInnerHtml",listData.innerHTML); 
   listData.setAttribute("listValue",form1.CurrentNodeID.value)
   listData.save("myCache");    
};

function BuildList(){
   var NodeID;
   var xmlDoc;
   
   //获出节点//
   if (event.srcElement){
      NodeID=event.srcElement.value;
   }else{
      NodeID=1;
   }

   //获取缓存//
   var listData=document.getElementById("List")
   listData.load("myCache"); 
   cacheData=listData.getAttribute("listInnerHtml")
   var listValue=listData.getAttribute("listValue")

   //缓存载入判断//   
   if (NodeID==1 && cacheData!=null){
      form1.CurrentNodeID.value=listValue;
      document.getElementById("List").innerHTML=cacheData;
      for(var j=0;j<document.all.tags("select").length;j++){
      var listObj=document.all.tags("select")[j];
        listObj.attachEvent("onchange",function(){BuildList()});
      };
   }else{
      if (NodeID!=null){
         var nodeLength;
         var listObj;
      var listItem;
      var nodeObj;
      var myErr;
      var i=0;
        var j=0;
      var listIndex=0;
      var listCount;

         //清空缓存//
      　 var listData=document.getElementById("List")
      if(listData.getAttribute("listInnerHtml")!=null){
  　     listData.removeAttribute("listInnerHtml");
            listData.save("myCache");   
         }
          
         //赋值//

      document.getElementById("CurrentNodeID").value=NodeID;
      listCount=document.all.tags("select").length
			
         //读取子栏目数据//
				if (window.ActiveXObject)
				{
				        xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
				        xmlDoc.async=false;
				        xmlDoc.load("getNodeXml.php?NodeID="+ NodeID +"");
				}
				// code for Mozilla, Firefox, Opera, etc.
				else if (document.implementation && document.implementation.createDocument)
				{
				        xmlDoc=document.implementation.createDocument("","",null);
				        xmlDoc.load("getNodeXml.php?NodeID="+ NodeID +"");
				}
				else
				{
				        alert('Your browser cannot handle this script');
				}
//         var xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
//         xmlDoc.async = false;
//         xmlDoc.load("getNodeXml.php?NodeID="+ NodeID +"");

         if (xmlDoc.parseError.errorCode != 0) {
            myErr = xmlDoc.parseError;
            alert("XML载入失败！" + myErr.reason);
         } else {
            nodeObj=xmlDoc.getElementsByTagName("Node");
            nodeLength=nodeObj.length;
            currNode = xmlDoc.documentElement.childNodes.item(0);
         };

         //获取当前下拉列表索引值//
         for(listIndex=0;listIndex<=listCount;listIndex++){
           if (document.all.tags("select")[listIndex]==event.srcElement){
         break;
      };
       };
      
      //列表移除//
         if (listIndex+1<=listCount){

            for (j=listCount-1;j>listIndex;j--){
      if (document.all.tags("select")[j].id.indexOf("TreeList")==0){      
                 document.all.tags("select")[j].removeNode(true);
               };
         };
         };
               
      //列表建立//
      if (nodeLength!=0){
            listObj = document.createElement("select")
            listObj.id="TreeList";
            listObj.attachEvent("onchange",function(){BuildList()});
            listObj.options[listObj.options.length++] = new Option("----------","");
           for (i=0;i<nodeLength;i++){
               listObj.options[listObj.options.length++] = new Option(nodeObj.item(i).childNodes[1].text,nodeObj.item(i).childNodes[0].text);
         };
            List.appendChild(listObj);  
         };
      };
   };
};

function SetFontSize(Size){
   var Obj=document.getElementById("Body")
   switch (Size){
      case "S":
    Obj.className="Content_Small";
       break;
      case "M":
    Obj.className="Content_Middle";
       break;
      case "L":
    Obj.className="Content_Large";      
       break;
   }
}