加个状态，防止多次点击

@@ -26,7 +26,8 @@ var provFn,
     identityFn;
 
 var alertConfig,
-    makeAlert;
+    makeAlert,
+    identityFlag = false;
 
 // j面跳转对象
 var redirect = {
@@ -158,11 +159,16 @@ function clearSelectUl($a, code) {
     $ul.empty();
     $wrap.removeClass('active');
 }
-
 /**
  * 最终提交表单
  */
 function submitIdentity(json) {
+
+    if (identityFlag) {
+        return;
+    }
+    identityFlag = true;
+
     // xls-3提交认证埋点
     givePoint('YB_STUDENT_ATTCT_SUBMIT', {SRC_ID: 2, SUBMIT_RES: 1});
     $.ajax({
@@ -172,10 +178,12 @@ function submitIdentity(json) {
     }).then(function(data) {
         if (data.code === 200) {
             window.location.href = data.data;
-
+            
             // xls-4认证成功埋点
             givePoint('YB_STUDENT_ATTCT_RESULT', {SRC_ID: 5, SUBMIT_RES: 1});
         } else {
+            identityFlag = false;
+
             $identityForm.addClass('hide');
             $('identity-back-wrap').remove();
             $identityWrap.append(identityFn({msg: data.message}));
@@ -708,3 +716,7 @@ $(function() {
             F_URL: url, F_INDEX: 6, I_INDEX: parseInt(index, 0) + 1});
     });
 });
+
+window.onbeforeunload = function(){
+    clearForm();
+}