var timeout       = 6000;
var closetimer		= null;
var ddmenuitem    = 0;
var ddmenu 				= 0;
var numid 				= 0;
var btn 					= 0;

function mopen(id)
{	
	mcancelclosetime(id);

	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';

	numid = id.replace("m", "");
	ddmenu = document.getElementById("dropmenu").getElementsByTagName("LI");
	ddmenuitem = document.getElementById(id);
	ddmenuitem.style.visibility = 'visible';

}
function mclose(id)
{
	if(ddmenuitem) {
    ddmenuitem.style.visibility = 'hidden';
    numid = id.replace("m", "");
    ddmenu = document.getElementById("dropmenu").getElementsByTagName("LI");
    btn = ddmenu[numid].getElementsByTagName("A");
    btn[0].style.background = 'transparent url(./img/btn_' + btn[0].id + '.gif) 0 0 no-repeat';
	}
}

function mclosetime(id)
{
	closetimer = mclose(id);
}
function mcancelclosetime(id)
{
	if(closetimer)
	{
		clearTimeout(closetimer);
		closetimer = null;
	}
	numid = id.replace("m", "");
	ddmenu = document.getElementById("dropmenu").getElementsByTagName("LI");
	btn = ddmenu[numid].getElementsByTagName("A");
	btn[0].style.background = 'transparent url(./img/btn_' + btn[0].id + '.gif) 0 -31px no-repeat';
}

document.onclick = mclose('m0');
document.onclick = mclose('m1');
document.onclick = mclose('m2');
document.onclick = mclose('m3');