1disabled只對button按鈕有效
(1)設定按鈕不可點選
document.getElementById(“bt1”).disabled=ture;

(2)設定按鈕可點選

document.getElementById(“bt1”).disabled=false;

2純js獲取引數的方法

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;
}