從url獲取參數

//獲取url參數值
function GetQueryString(name) {
    var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i");
    var r = window.location.search.su bstr(1).match(reg);  //獲取url中"?"符後的字符串並正則匹配
    var context = "";
    if (r != null)
        context = r[2];
    reg = null;
    r = null;
    return context == null || context == "" || context == "undefined" ? "" : context;
}

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注意：調用該函數的時候，需要給參數加引號