<input type="number" class="code" name="verify" placeholder="请输入<em>手机</em><em>验证码</em>
" required maxlength="6">
<input type="button" class="obtain generate_code" value=" <em>获取</em><em>验证码</em>">
</div
if (countdown == 0) {
_generate_code.attr("disabled",false);
_generate_code.val("
获取验证码
</script>
方案2:
<input type="number" class="code" placeholder="请输入<em>手机</em><em>验证码</em>
" required maxlength="6">
<input type="button" class="obtain generate_code" value=" <em>获取</em><em>验证码</em>" onclick