update for text length limit

@@ -450,6 +450,18 @@ function bindUploadEvent() {
     });
 }
 
+function bindKeyUpEvent() {
+    $('.mark-text').on('keyup', function() {
+        var $this = $(this),
+            str = $.trim($this.val());
+
+        if (str.length > 100) {
+            str = str.substring(0, 100);
+        }
+        $this.val(str);
+    });
+}
+
 $(document).on('ready', function() {
     getProductInfo();
     bindSelectEvent();
@@ -459,4 +471,5 @@ $(document).on('ready', function() {
     initAddr($('#city').data('code'));
     bindBlurEvent();
     bindUploadEvent();
+    bindKeyUpEvent();
 });