onloadHooks.push(function(){ 
	configureHovers();
});

function configureHovers() {
	$$('.img_wrap').each(function(item, index){
		item.addEvent('mouseover',function(){
			var current = item.getChildren('.text_wrap')[0];
			current.setStyle('top','-'+current.getStyle('height'))
		});
	});
}