function equalHeight(group){
	tallest=0;
	group.each(function(){
		thisHeight=$(this).height();
		if(thisHeight>tallest){
			tallest=thisHeight;
		}
	});
	group.height(tallest);
}
$(document).ready(function(){
	equalHeight($(".col"));
	equalHeight($(".col2"));
	equalHeight($(".col3"));
});