Get Dropdown Menu Value on JQuery

Here is the small JQuery code for getting the value of the dropdown box which is selected.

HTML

 <select name="dropDownMenu">
   <option>Option1</option>
   <option>Option1</option>
   <option>Option1</option>
 </select>

JS

$(document).ready(function(){
   $("select").change(function(){
      var str="";
      str=$("select option:selected").text();
      alert(str);
   });
});