function f1(){
		window.group_2.innerHTML="";
		window.group_3.innerHTML="";
		window.group_1.innerHTML="<li onmouseover=on_select("art1.htm")> Stats_1 </li>
								  <li onmouseover=on_select("art2.html")> Stats 2 </li>
								  <li onmouseover=on_select("art3.html")> Stats 3 </li>";};
function f2(){
		window.group_1.innerHTML="";
		window.group_3.innerHTML="";
		window.group_2.innerHTML="<li onmouseover=on_select("art4.html")> Stats 4 </li>
								  <li onmouseover=on_select("art5.html")> Stats 5 </li>
								  <li onmouseover=on_select("art6.html")> Stats 6 </li>";};		
		
function f3(){
		window.group_1.innerHTML="";
		window.group_2.innerHTML="";
		window.group_3.innerHTML="<li onmouseover=on_select("art7.html")> Stats 7 </li>
								  <li onmouseover=on_select("art8.html")> Stats 8 </li>
								  <li onmouseover=on_select("art9.html")> Stats 9 </li>";};
		
function on_select(name)		
				{
					top.main.location.replace(name);};
				
</script>
<form>
<div style="color:blue; text-decoration:underline;">
	<p onmouseover="f1();"> Group 1</p><ul id="group_1" name="group_1"></ul>
	<p onmouseover="f2();"> Group 2</p><ul id="group_2" name="group_2"></ul>
	<p onmouseover="f3();"> Group 3</p><ul id="group_3" name="group_3"></ul>
</div>
</form>
SCRIPT1004: Предполагается наличие ';' 
Untitled-2.html, строка 16 символ 56 
WTF ?????
У меня 16 строка и 56 элемент, это <li onmouseover=on_select("art1.htm")> , символ перед art.html