js序列化字符串转对象

/*
 serializedParams格式为"key1=value1&key2=value2".
 也支持'key.sonkey=value'
 */
function paramString2obj (serializedParams) {
    var obj={};
    function evalThem (str) {
        var strAry = new Array();
        strAry = str.split("=");
        //使用decodeURIComponent解析uri 组件编码
        for(var i = 0; i < strAry.length; i++){
            strAry[i] = decodeURIComponent(strAry[i]);
        }
        var attributeName = strAry[0];
        var attributeValue = strAry[1].trim();
        //如果值中包含"="符号，需要合并值
        if(strAry.length > 2){
            for(var i = 2;i<strAry.length;i++){
                attributeValue += "="+strAry[i].trim();
            }
        }
        if(!attributeValue){
            return ;
        }
        var attriNames = attributeName.split("."),
            curObj = obj;
        for(var i = 0; i < (attriNames.length - 1); i++){
            curObj[attriNames[i]]?"":(curObj[attriNames[i]] = {});
            curObj = curObj[attriNames[i]];
        }
        //使用赋值方式obj[attributeName] = attributeValue.trim();替换
        //eval("obj."+attributeName+"=\""+attributeValue.trim()+"\";");
        //解决值attributeValue中包含单引号、双引号时无法处理的问题
        curObj[attriNames[i]] = attributeValue.trim();
    };
    var properties = serializedParams.split("&");
    for (var i = 0; i < properties.length; i++) {
        //处理每一个键值对
        evalThem(properties[i]);
    };
    return obj;
}