表单全选以及将选中的checkbox写入到cookie中

<script type="text/javascript">

/*全选*/
function checkAll(){

var checkname=document.getElementsByName("items");
for (var i = 0; i < checkname.length; i++) {
checkname[i].checked = event.srcElement.checked;
}
total11();
}

/*计算选中的价格*/

function total11(){
var sum=0;
var checkname=document.getElementsByName("items");
for (var i = 0; i < checkname.length; i++) {
if(checkname[i].checked){
sum+= parseInt(checkname[i].value);

}
} }
/*选中某一个计算价格*/
function iniEvent() {
var checkname = document.getElementsByName("items");
for (var i = 0; i < checkname.length; i++) {
checkname[i].onclick = total11;
}
}

/*提交表单，并写入到cook，已经使用flag判断是否有一个被选中*/
function submitfrom() {
var checkvalue=‘‘;
var flag = false;
var checkname=document.getElementsByName("items");
for (var i = 0; i < checkname.length; i++) {
if(checkname[i].checked){
checkvalue+= checkname[i].value+‘,‘;
flag = true ;
setcookie(‘items‘,checkvalue,setcookieday(10));
}
}
if(!flag){
alert("请最少选择一项！");

return false ;
}
}
function setcookie(name,value,expires,path,domain,secure){
var cookiename=encodeURIComponent(name)+‘=‘+encodeURIComponent(value);
if(expires instanceof Date){
cookiename+=‘;expires=‘+expires;
}
if(path){
cookiename+=‘;path=‘+path;
}
if(secure){
cookiename+=‘;secure‘;
}
document.cookie=cookiename;
}
function setcookieday(day){
var date=null;
if(typeof day == ‘number‘&& day>0){
date = new Date();
date.setDate(date.getDate()+day);}
return date;
}

</script>

如何调用例子