Description: Remove the whitespace from the beginning and end of a string.
<!DOCTYPE html>
<html>
<head>
  <script src="https://code.jquery.com/jquery-latest.js"></script>
</head>
<body>
	<button>Show Trim Example</button>
<script>
    $("button").click(function () {
      var str = "     lots of spaces before and after     ";
      alert("'" + str + "'");
      str = jQuery.trim(str);
      alert("'" + str + "' - no longer");
    });
</script>
</body>
</html>
$.trim("  hello, how are you?  ");
"hello, how are you?"