function topleft ()
{
	document.getElementById("topleftmenu").className='active';
    document.getElementById("toprightmenu").className='';
    document.getElementById("midleftmenu").className='';
	document.getElementById("midrightmenu").className='';
}
function topright ()
{
	document.getElementById("topleftmenu").className='';
    document.getElementById("toprightmenu").className='active';
    document.getElementById("midleftmenu").className='';
	document.getElementById("midrightmenu").className='';
}
function midleft ()
{
	document.getElementById("topleftmenu").className='';
    document.getElementById("toprightmenu").className='';
    document.getElementById("midleftmenu").className='active';
	document.getElementById("midrightmenu").className='';
}
function midright ()
{
	document.getElementById("topleftmenu").className='';
    document.getElementById("toprightmenu").className='';
    document.getElementById("midleftmenu").className='';
	document.getElementById("midrightmenu").className='active';
}