function getQueryString(name) {
    var reg = new RegExp('(^|&)' + name + '=([^&]*)(&|$)', 'i');
    var r = window.location.search.substr(1).match(reg);
    if (r != null) {
        return unescape(r[2]);
    }
    return null;
}
// 這樣調用：
alert(GetQueryString("參數名1"));

alert(GetQueryString("參數名2"));

alert(GetQueryString("參數名3"));

function GetRequest() {
    var url = location.search; //獲取url中"?"符后的字串
    var theRequest = new Object();
    if (url.indexOf("?") != -1) {
        var str = url.substr(1);
        strs = str.split("&");
        for(var i = 0; i < strs.length; i ++) {
            theRequest[strs[i].split("=")[0]] = unescape(strs[i].split("=")[1]);
        }
    }
    return theRequest;
}
var Request = new Object();
Request = GetRequest();
// var 參數1,參數2,參數3,參數N;
// 參數1 = Request['參數1'];
// 參數2 = Request['參數2'];
// 參數3 = Request['參數3'];
// 參數N = Request['參數N'];

function GetQueryString(name) { 
    var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i"); 
    var r = window.location.search.substr(1).match(reg);  //獲取url中"?"符后的字符串并正則匹配
    var context = ""; 
    if (r != null) 
         context = r[2]; 
    reg = null; 
    r = null; 
    return context == null || context == "" || context == "undefined" ? "" : context; 
}
alert(GetQueryString("q"));