startList = function() 

{
if (document.all&&document.getElementById) 
   {
	navRoot = document.getElementById("mainnav");

	

	for (i=0; i<navRoot.childNodes.length; i++) 

	{
	node = navRoot.childNodes[i];


		if (node.nodeName=="LI") 

			{
				node.onmouseover=function() 

					{this.className+=" over";}

  				node.onmouseout=function() 

				{this.className=this.className.replace(" over", "");}
   			}
  	}
    }
}

window.onload=startList;