[RESOLVED]wp_head breaks javascript

If i include the wp_head in my header.php file it will break my javascript which is:

<script type="text/javascript">

	window.addEvent('domready', function() { 

var sliders = $$(".moreinfo");
var triggers = $$(".toggle") ;

triggers.each(function( o, x ){
	var sl = new Fx.Slide( sliders[x], { } );
		$(triggers[x]).addEvent('click',function(e){
		e = new Event(e);
		sl.toggle();
		e.stop(); })
			sl.hide();
});
}  )// end

	</script>

Any ideas why this occurs?