$（'textarea'）。keypress（function（event）{
 if（event.which == 13）{
 event.preventDefault（）; 
 var s = $（this） .val（）; 
 $（this）.val（s +\ n）; 
} 
}）; 
 pre> 

  JSFiddle演示 
 
I have a form with a text area and hitting the enter key submits my form. How can I make it to  add a new line character instead of a form submit.
$('textarea').keypress(function(event) {
   if (event.which == 13) {
      event.preventDefault();
      var s = $(this).val();
      $(this).val(s+"\n");
   }
});​
JSFiddle Demo