function ge(a){ return document.getElementById(a); }
function mshow(a){ mhide(); ge(a).style.display = 'block'; ge(a + 'Shadow').style.display = 'block'; set_actions(); }
function mhide(){ for(i=1;i<6;i++){ a = 'subTop' + i;ge(a).style.display = 'none'; ge(a + 'Shadow').style.display = 'none';} reset_actions();}

function set_actions(){
	ge('left_menu').onmouseover = mhide;
	ge('content').onmouseover = mhide;
}

function reset_actions(){
	ge('left_menu').onmouseover = null;
	ge('content').onmouseover = null;
}