Check if some object exists before we load it e.g. swfobject (use typeof so it works in oldIE) #js #swfobject #ie8

swfload.js

(function swfEmbed() {
	if ( typeof swfobject === 'undefined' ) {
		setTimeout( function () { swfEmbed(); }, 100 );
	} else {
		var vars = { xmlPath: '/RotatorXml', linkCol: '#ffffff' };
		var params = {};
		var attributes = {};
		swfobject.embedSWF( "/flash/HomepageRotator.swf", "rotator-homepage-flash", "796", "428", "9.0.0", "/flash/expressInstall.swf", vars, params, attributes );
	}
} )();