如何获取客户端控件所传的值

怎么获取客户端控件所传的值
<input onclick='Showweb(this)' id='" + city[i].cityID + "' value='" + city[i].cityID + "|" + city[i].cityName + "|" + city[i].cityLevel+ "' type='checkbox' />" + dcity[i].cityName + ">
在页面上怎么获取所传的值，(所传的值有三个)

[解决办法]
http://www.google.cn/search?hl=zh-CN&source=hp&q=javascript%E8%8E%B7%E5%8F%96%E6%8E%A7%E4%BB%B6%E5%80%BC&aq=0g&oq=javascript+%E8%8E%B7%E5%8F%96%E6%8E%A7%E4%BB%B6
[解决办法]
function Showweb(obj)
{
var value = obj.value;
alert(value);
var cityID = value.split('|')[0];
var cityName = value.split('|')[1];
var cityLeave = value.split('|')[2];
}