實現發送短信驗證碼後60秒倒計時

function settime(obj) { //發送驗證碼倒計時 if (countdown == 0) { obj.attr(‘disabled’,false); //obj.removeattr(「disabled」); obj.val(「免費獲取驗證碼」); countdown = 60; return; } else { obj.attr(‘disabled’,true); obj.v

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