加载jQuery的几种方法

加载jQuery的几种方法

Load&nbspwith&nbspGoogle&nbspAPI

<script src="http://www.google.com/jsapi" type="text/javascript"></script>
<script type="text/javascript">
    google.load("jquery", "1.2.6");
</script>
<script type="text/javascript" src="js/example.js"></script>

Direct&nbspLink&nbspto&nbspGoogle

<script type='text/javascript' src='http://ajax.useso.com/ajax/libs/jquery/1.3.2/jquery.min.js?ver=1.3.2'></script>

Check&nbspif&nbsploaded,&nbsponly&nbspload&nbspif&nbspunloaded

var jQueryScriptOutputted = false;
function initJQuery() {
   //if the jQuery object isn't available
   if (typeof(jQuery) == 'undefined') {
       if (! jQueryScriptOutputted) {
           //only output the script once..
           jQueryScriptOutputted = true;
           //output the script (load it from google api)
           document.write("<scr" + "ipt type="text/javascript" src="http://ajax.useso.com/ajax/libs/jquery/1.3.2/jquery.min.js"></scr" + "ipt>");
       }
       setTimeout("initJQuery()", 50);
   } else {
       $(function() {
           //do anything that needs to be done on document.ready
       });
   }
}