Fix ad_banner

app/assets/javascripts/inc/modal-preview.js

@@ -6,10 +6,17 @@ $(document).ready(function() {
 	$("a.preview_trigger").click(function(){
 		$(this).after("<span id='show_preview'></span>");
 		$.ajax({
-			type:"put",
+			type: 'PUT',
+			//async : true,
 			url:$(this).attr("href"),
-			data:$(this).parents("form").serialize()
-			}).done(function(){ $("#"+start_modal_with_id).modal('show');});  
-			return false;}
-		);
+			contentType: 'application/javascript; charset=utf-8',
+			data:$(this).parents("form").serialize(),
+			success: function (msg) {
+					$("#"+start_modal_with_id).modal('show'); },
+			error: function(){
+				alert("ERROR");
+				}
+			});  
+			return false;
+		});
 });