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js 驗證碼倒計時效果

倒計時 disabled remove 獲取 return ble imei timeout 計時

function settime(obj) {
    if(second == 0){
        obj.removeAttribute("disabled"); 
        obj.value="獲取驗證碼"; 
        second = 300; 
        return;
    }else{
        obj.setAttribute("disabled", true); 
        obj.value="重新發送(" + second + ")"; 
        second--; 
    }
timeId = window.setTimeout(function
(){settime(obj)},1000); };

obj參數傳入this即可。

js 驗證碼倒計時效果