refactor

@@ -767,19 +767,12 @@ $captchaSmsInput.on('blur', function() {
 
 // 短信验证码发送按钮
 $captchaSmsBtn.on('click', function() {
-    var val = getAccountVal();
-
-    if (val === '') {
-        showAccountTip('请输入手机号');
-        return;
-    }
-
     // 已在发送短信时间范围内
     if ($captchaSmsBtn.hasClass('second-progress')) {
         return;
     }
 
-    currentLogin.validateAccountAsync().then(function() {
+    validateAccount().then(function() {
         switchSmsBtnState();
         return sendCaptchaSmsAsync();
     });