function exTopMenu(num)
{
	var _obj = document.getElementsByName("Top_menu");
	var num;
	if(num!=undefined)
	{  
		  _obj[num].className="menu_on";
	}
}
function clTopMenu(num)
{
	var _obj = document.getElementsByName("Top_menu");
	var num;
	if(num!=undefined)
	{
		_obj[num].className="";
		if(defaultSelect!=undefined)
		{
		   _obj[defaultSelect].className="menu_on";
			
		}
	}
}
window.onload=function()
{
	if(defaultSelect!=undefined) exTopMenu(defaultSelect);
}