如果通过JS获取url链接参数的函数

function GetQueryString(name) {

        var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i");

        var r = window.location.search.substr(1).match(reg);

        var context = "";

        if (r != null)

                context = r[2];

        reg = null;

        r = null;

        return context == null || context == "" || context == "undefined" ? "" : context;

}

alert(GetQueryString("q"));