JavaScript获取url参数

声明：以下内容转自网络

方法一

String.prototype.getUrlString = function(name) {
            var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
            var r = this.substr(this.indexOf("?") + 1).match(reg);
            if (r != null) return unescape(r[2]);
            return null;
        };

alert(top.window.location.href.getUrlString("r"));

方法二

function getQueryString(name) {
            var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i");
            var r = window.location.search.substr(1).match(reg);
            if (r != null) return decodeURIComponent(r[2]); return null;
        }

方法三

function geturlParam(name) {
            var vars = [], hash;
            var hashes = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&');
            for (var i = 0; i < hashes.length; i++) {
                hash = hashes[i].split('=');
                vars.push(hash[0]);
                vars[hash[0]] = hash[1];
            }
            return vars[name];
        }

方法四

function urlArgs() {
    var args = {};                             // Start with an empty object
    var query = location.search.substring(1);  // Get query string, minus '?'
    var pairs = query.split("&");              // Split at ampersands
    for(var i = 0; i < pairs.length; i++) {    // For each fragment
        var pos = pairs[i].indexOf('=');       // Look for "name=value"
        if (pos == -1) continue;               // If not found, skip it

        var name = pairs[i].substring(0,pos);  // Extract the name
        var value = pairs[i].substring(pos+1); // Extract the value
        value = decodeURIComponent(value);     // Decode the value
        args[name] = value;                    // Store as a property
    }
    return args;                               // Return the parsed arguments
}

方法五

function getQueryStringArgs(){

            //get query string without the initial ?
            var qs = (location.search.length > 0 ? location.search.substring(1) : ""),

                //object to hold data
                args = {},

                //get individual items
                items = qs.length ? qs.split("&") : [],
                item = null,
                name = null,
                value = null,

                //used in for loop
                i = 0,
                len = items.length;

            //assign each item onto the args object
            for (i=0; i < len; i++){
                item = items[i].split("=");
                name = decodeURIComponent(item[0]);
                value = decodeURIComponent(item[1]);

                if (name.length){
                    args[name] = value;
                }
            }

            return args;
        }

        //assume query string of ?q=javascript&num=10

        var args = getQueryStringArgs();

        alert(args["q"]);     //"javascript"
        alert(args["num"]);   //"10"