js实现翻页后保持checkbox选中状态的实现方法

String ids= (String)request.getAttribute("ids");
if((ids==null)){
ids="";
}

function _prePage()
{
var ids="<%=ids%>";
var checkedIds= new String(ids);

var modules = document.getElementsByName("module");
var operates = document.getElementsByName("operate");

for ( var i = 0; i < modules.length; i++) {
if (modules[i].type == "checkbox" && modules[i].checked) {
if(checkedIds.indexOf(modules[i].value)==-1){
checkedIds=checkedIds+modules[i].value+",";
}
//判断模块下的操作
for ( var j = 0; j < operates.length; j++) {
var operateId = new String(operates[j].id);
operateId = operateId.substring(0, operateId.indexOf(","));
if (modules[i].value == operateId) {
if (operates[j].type == "checkbox"&& operates[j].checked) {
if(checkedIds.indexOf(operates[j].value)==-1){
checkedIds=checkedIds+operates[j].value+",";
}
}

if(operates[j].checked==false){
if(checkedIds.indexOf(operates[j].value)!=-1){
checkedIds=checkedIds.replace((operates[j].value+","),"");
}
}
}
}
}

if(modules[i].checked==false){
if(checkedIds.indexOf(modules[i].value)!=-1){
checkedIds=checkedIds.replace((modules[i].value+","),"");
}
}
}

with(document.forms[0])
{
action="roleAuthoriedManager!getModuleOperateBySystem?roleId="
+document.getElementById("roleId").value
+"&systemId="+document.getElementById("systemId").value
+"&pageNo="+<%=pageModelModule.getPreviousPageNumber()%>
+"&queryString="+document.getElementById("searchById").value
+"&ids="+checkedIds;
method="post";
submit();
}
}

document.onreadystatechange=statechange;
function statechange()
{
var ids="<%=ids%>";
var checkedIds= new String(ids);
if(document.readystate="complete")
{
//循环所有的控件
var inputs=document.getElementsByTagName("input");
for(var i=0;i<inputs.length;i++)
{
if(inputs[i].type=="checkbox")
{
if(checkedIds.indexOf(inputs[i].value)!=-1)
{
inputs[i].checked=true;
}
}
}
}
}