var hotels_box= document.getElementById("hotels_box");
var h3= hotels_box.getElementsByTagName("h3");
var ul =hotels_box.getElementsByTagName("ul");

for(i=0; i<h3.length; i++){
	h3[i].ids = i;
	
	h3[i].onmouseover = function(){	
		var m=this.ids
		for(j=0; j<ul.length; j++){
			ul[j].className = "";
			h3[j].className = "";
		}
		ul[m].className = "hotels_list";
		h3[m].className = "hotels_h3";
	}

}