function sm_hide() {
	var s=document.getElementById('submenu').getElementsByTagName('span');
	
	var i;
	for (i=0; i<s.length; i++){
		s[i].style.display='none';
	}
}

function sm_show(id) {
	//sm_hide();
	var p=document.getElementById(id);
	var c=document.getElementById(p.id+'_children');
	
	c.style.top=(p.offsetTop +17)+'px';
	c.style.left=p.offsetLeft + "px";
	c.style.display='block';
}