Stop Enter/Return Key Page Submit

Now I am facing another problem. I have some textarea means multiline textbox. Now it is not accepting return key. So I can't add new line.

After a little bit finding I change a little bit into that function as follows.

$(document).ready(function () {
           $("input").keydown(function (event) {
               if (event.keyCode == 13) {
                   event.preventDefault();
                   return false;
               }
           });
       });

As I have to protect only all inputs to react against return hit, it works perfectly.