function setClass(over, where)
{
	var hoverStr = 'hover';

	if (over)
	{
		where.className = hoverStr;
	}
	else
	{
		where.className = '';
	}
}

function adaptLis()
{
	var lis = document.getElementById("mainMenu").getElementsByTagName("li");

	if (lis != "" && lis != undefined && lis != null)
	{
		for (i = 0; i < lis.length; i++)
		{
			li = lis[i];

			li.onmouseover = function()
			{
				setClass(true, this);
			}

			li.onmouseout = function()
			{
				setClass(false, this);
			}
		}
	}
}

window.onload = adaptLis;