function showhide(num, vis) {

	if (document.layers) {
		document.layers[num].visibility = vis ? 'show' : 'hide' ;
	}
	else if (document.all) {
		document.all[num].style.visibility = vis ? 'visible' : 'hidden' ;
	}
	else if (document.getElementById) {
		document.getElementById(num).style.visibility = vis ? 'visible' : 'hidden' ;
	} 
	
}

function position_aide() {
   document.getElementById('aide_cmd').style.position = "absolute";
   document.getElementById('help_order').style.position = "absolute";
}