function set_nav_focus()
{
	param = location.search;
	nav_index = -1;
	for(i=0;i<nav.length;i++)
	{
		for(j=0;j<nav[i].length;j++)
		{
			if(nav[i][j]==param)
			{
				nav_index = i;
				break;
			}
		}
	}
	if(nav_index>=0&&document.getElementById("header_nav_"+nav_index)!=null)
	{
		document.getElementById("header_nav_"+nav_index).className = "navCurrent";
	}
}
set_nav_focus();