<script type=”text/javascript”>
jQuery(document).ready(function() {
if ($(“#divId”).length > 0){
// your code here
}
});
</scrip

jQuery is a multi-browser JavaScript library designed to simplify the client-side scripting of HTML. It was released in January 2006 at BarCamp NYC by John Resig. Used by over 55% of the 10,000 most visited websites, jQuery is the most popular JavaScript library in use today

<script type=”text/javascript”>
jQuery.noConflict();
jQuery(document).ready(function() {
// Your code comes here
});
</script>