if (document.images) {
		v_home1 = new Image; v_home2 = new Image;
		v_home1.src = "images/top/top_home_1.gif";
		v_home2.src = "images/top/top_home_2.gif";

		v_uw1 = new Image;	v_uw2 = new Image;
		v_uw1.src = "images/top/top_uw_1.gif";
		v_uw2.src = "images/top/top_uw_2.gif";
	} else {
		v_home1 = " ";	v_home2 = " ";
		v_uw1 = " ";	v_uw2 = " ";
		document.top_home = " ";
		document.top_uw = " ";
	}	

	function changeImage( imgOriginal, imgNew ) {
		document.images[imgOriginal].src = imgNew.src;
	}
	
	function toggle(targetId) {
  	if(document.getElementById) {
    	target = document.getElementById(targetId);
    	ts = target.style;
    	if(ts.display == "none"){
      		ts.display = "";
    		} else {
      		ts.display = "none";
    		}
  		}
	}
	
	function showDiv(divID) {
		document.getElementById(divID).style.display='block';
	}
	
	function hideDiv(divID) {
		document.getElementById(divID).style.display='none';
	}
	
	function homeOver() {
		changeImage('top_home', v_home2); 
		showDiv('toHome');
	}
	
	function homeOut() {
		changeImage('top_home', v_home1); hideDiv('toHome');
	}
	
	function uwOver() {
		changeImage('top_uw', v_uw2); 
		showDiv('toUW');
	}
	
	function uwOut() {
		changeImage('top_uw', v_uw1); 
		hideDiv('toUW');
	}