Checks to see whether jQuery is already loaded

if (typeof jQuery == ‘undefined’) {
var jQ = document.createElement(‘script’);
jQ.type = ‘text/javascript’;
jQ.onload=runthis;
jQ.src = ‘http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js’;
document.body.appendChild(jQ);
} else {
runthis();
}

function runthis() {
// your JavaScript code goes here!
}

Advertisement