如何实现点击选择select时不闪动，求js高手

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />

<title>无标题文档</title>

<script language="javascript" defer="defer">

   var cc_Array = new Array(

   [0,1,"企业文化"],

   [1,4,"规章制度"],

   [0,28,"网站公告"],

   [0,33,"建筑开发"],

   [0,34,"建筑产品"],

   [0,35,"工程实例"],

   [0,36,"企业荣誉"],

   [0,37,"企业资质"],

   [35,38,"装饰工程"],

   [35,39,"小区园林"],

   [35,40,"建筑工程"],

   [35,41,"民用住宅"],

   [34,42,"防盗门"],

   [34,43,"陶粒气块"],

   [39,44,"电线圈"],

   [39,45,"塑钢窗"],

   [34,46,"苯板"],

   [33,47,"开发实例"],

   [33,48,"热卖楼盘"]);

  

   var cc_AllID="";     //所有类别ID集合

   var cc_Value=""; // 存储最终取得的类别的值

   var cc_Tips="选择分类";    //提示字符

  

   function cc_IsNextClass(ClassID){

       for(var i=0;i<cc_Array.length;i++){

     	  if(cc_Array[i][0]==ClassID){return true;}

   	   }

       return false;

   }

  

   function cc_getParentId(ClassID){

       for(var i=0;i<cc_Array.length;i++){

           if(cc_Array[i][1]==ClassID){return cc_Array[i][0];}

       }

       return -1;

   }

  

   function cc_DrawLists(SelectName,ClassID,Mode,Html,TheOption){

   	var ParentID=cc_getParentId(ClassID);

    var TheSelected="";

    var HtmlCode="";

    cc_AllID+="," + ClassID;

    ParentID=(ParentID==0) ? -1:ParentID;

    HtmlCode="<select name=\""+SelectName+"_PPST\" id=\""+SelectName+"_PPST\" onChange={javascript:cc_DrawLists(\""+SelectName+"\",this.value.split(\"|\")[0],"+Mode+",\"\",\""+TheOption+"\")}>\n";

    HtmlCode+="<option value=\""+ParentID+"\">"+cc_Tips+"</option>\n";

    ParentID=(ParentID==-1) ? 0:ParentID;

    for(var i=0;i<cc_Array.length;i++){

    	if(cc_Array[i][1]==ClassID){

        	TheSelected=" selected";

      		switch(Mode){

      		case 0:

       			cc_Value+="," + cc_Array[i][1];

      			 break;

      		case 1:

      			 cc_Value+="," + cc_Array[i][2];

      			 break;

      		case 2:

       			cc_Value+="," + cc_Array[i][1] + "|" + cc_Array[i][2];

       		break;

      		}

		}else{

		 	TheSelected="";

		}

     	if(cc_Array[i][0]==ParentID){

	 		HtmlCode+="<option value=\""+cc_Array[i][1]+"|"+cc_Array[i][2]+"\""+TheSelected+">"+cc_Array[i][2]+"</option>\n";}

    	}

    	HtmlCode+="</select>\n"+Html

    	if(ParentID==0){

     		if(cc_IsNextClass(cc_AllID.split(",")[1])){

      			HtmlCode+="<select name=\""+SelectName+"_PPST\" id=\""+SelectName+"_PPST\" onChange={javascript:cc_DrawLists(\""+SelectName+"\",this.value.split(\"|\")[0],"+Mode+",\"\",\""+TheOption+"\")}>\n";

     			HtmlCode+="<option value=\""+ParentID+"\">"+cc_Tips+"</option>\n";

				for(var i=0;i<cc_Array.length;i++){

					if(cc_Array[i][0]==cc_AllID.split(",")[1]){

						HtmlCode+="<option value=\""+cc_Array[i][1]+"|"+cc_Array[i][2]+"\">"+cc_Array[i][2]+"</option>\n";

					}

				}

				HtmlCode+="</select>\n"

     		}

			cc_AllID="";

			var Value=cc_Value.split(",")[1];

			if(Value==null) Value="";

			HtmlCode+="<input type=\"hidden\" name=\""+SelectName+"\" id=\""+SelectName+"\" value=\""+Value+"\" />"

			cc_Value="";

			document.getElementById("cc_Container389_"+SelectName).innerHTML=HtmlCode;

    	}else{

    		cc_DrawLists(SelectName,ParentID,Mode,HtmlCode,TheOption);

    	}

   }

//根  

//cc_DrawLists("ClassID",-1,0,"","");

//定位到栏目

cc_DrawLists("ClassID",46,2,"","");

//栏目的值

//alert(document.getElementById("ClassID").value);



</script>

</head>



<body>

<table width="100%" border="0" cellspacing="0" cellpadding="0" class="Table">



<form action="?Action=AddNews&NewsID=" method="post" onsubmit="return CheckAddNewsSubmit(this)">



<tr>

    <td width="15%" class="right">信息分类： </td>

     <td width="85%" class="left"><span id="cc_Container389_ClassID"></span>

</td>

</tr>



</form>

</table>

</body>

</html>