Event.observe(document, 'dom:loaded', initqt); 

function  initqt() {
	var videoholder = $('video_player');
	if(videoholder) {
		vid_QT.write("video_player");
	}
	var fpholder = $('virtual_qt');
	if(fpholder) {
		floorQT.write("virtual_qt");
	}
}