javascript getElementsByClassName 和js取地址栏参数

function getElementsByClassName(ele,className) {
//获取所有子节点
if(document.all){
var children = ele.all;
}else{
var children = ele.getElementsByTagName('*');
}
//遍历子节点并检查className属性
var elements = new Array();
for (var i = 0; i < children.length; i++) {
var child = children[i];
var classNames = child.className.split(' ');
for (var j = 0; j < classNames.length; j++) {
if (classNames[j] == className) {
elements[elements.length] = child;
break;
}
}
}
return elements;
}

var trees = getElementsByClassName(document,'TreeView');

//v1:
var URLParams = new Array();
var aParams = document.location.search.substr(1).split('&');
for (i=0; i < aParams.length i++){
var aParam = aParams.split('=');
URLParams[aParam[0]] = aParam[1];
}
//取得传过来的name参数
name=URLParams['name'];

//v2:
Request = {
QueryString : function(item){
var svalue = location.search.match(new
RegExp('[/?/&]' + item + '=([^/&]*)(/&?)','i'));
return svalue ? svalue[1] : svalue;
}
}
var key = Request.QueryString('key');