jQuery : various

gistfile1

/* include jQuery */
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.js"></script>
<script src="http://cdn.jquerytools.org/1.2.5/jquery.tools.min.js"></script>
<script src="http://code.jquery.com/jquery-latest.min.js"></script>
/*--------------------------------*/
jQuery(document).ready(function($){
      $('').addClass("");
});
/*--------------------------------*/
$(document).ready(function(){
});
/*--------------------------------*/
$("").click(function(){});
/*--------------------------------*/
/* is even number ?*/
function isEven(value){return (value%2==0);}

/* to test if element exists */
if ($(".newspan").length > 0){
		alert('element exists');
	}else{
		alert('element does not exist');
}