javascript checkbox 赋值选中

<%@ page language="java" isELIgnored="false" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %><%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %><%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %><%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %><%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %><%@ page import="com.wprss.util.*" %> <mce:style type="text/css"><!--body {margin-left: 3px;margin-top: 0px;margin-right: 0px;margin-bottom: 0px;}body,td,th {font-size: 13px;}--></mce:style><style type="text/css" mce_bogus="1">body {margin-left: 3px;margin-top: 0px;margin-right: 0px;margin-bottom: 0px;}body,td,th {font-size: 13px;}</style><mce:script type="text/javascript"><!--function getValue(){ var ChkboxValue = ""; var chks = document.getElementsByTagName("input"); for(var i=0; i<chks.length; i++) { if(chks[i].type=="checkbox" && chks[i].checked ) { if ( ChkboxValue == "" ) ChkboxValue = chks[i].value; else ChkboxValue += ","+chks[i].value; } } document.getElementById("hi").value=ChkboxValue;//alert(ChkboxValue);}// --></mce:script> <logic:present name="listFDC"> <logic:iterate id="it" name="listFDC" indexId="index"><input type="checkbox" id="fdcdispaly" name="fdcdispaly" value="${it.wppid}" onclick="getValue();"/>${it.wppname}<br> </logic:iterate> </logic:present> <mce:script type="text/javascript"><!--var temp="${sessionScope.fdcdisplay}";if(temp!=""){ if(temp.indexOf(",")!=-1) { var strtext= new Array(); strtext=temp.split(","); //alert(document.all("fdcdispaly").length); for(var i=0;i<strtext.length;i++) { for(var j=0;j<document.all("fdcdispaly").length;j++) { if(document.all("fdcdispaly")[j].value==strtext[i]) { document.all("fdcdispaly")[j].checked=true; break; } } } } else { for(var j=0;j< document.all("fdcdispaly").length;j++) { if(document.all("fdcdispaly")[j].text==temp) { document.all("fdcdispaly")[j].checked=true; break; } } } //反选for(var i=0;i<document.all("fdcdispaly").length;i++) { f =document.all("fdcdispaly")[i]; if(f.checked==false) { f.checked=true; } else { f.checked=false; } } }// --></mce:script><input id="hi" name="hi" type="hidden" value="" />