function na_change_img_src(name, nsdoc, rpath, preload)
{ 
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  if (name == '')
    return;
  if (img) {
    img.altsrc = img.src;
    img.src    = rpath;
  } 
}
function na_restore_img_src(name, nsdoc)
{
  var img = eval((navigator.appName.indexOf('Netscape', 0) != -1) ? nsdoc+'.'+name : 'document.all.'+name);
  if (name == '')
    return;
  if (img && img.altsrc) {
    img.src    = img.altsrc;
    img.altsrc = null;
  } 
}
function mmenuhover()
{
        if(!document.getElementById("mmenu"))
                return;
        var lis = document.getElementById("mmenu").getElementsByTagName("LI");
        for (var i=0;i<lis.length;i++)
        {
                lis[i].onmouseover=function(){this.className+=" iehover";}
                lis[i].onmouseout=function() {this.className=this.className.replace(new RegExp(" iehover\\b"), "");}
        }
}
if (window.attachEvent)
        window.attachEvent("onload", mmenuhover);
var id_menu = new Array('sub_menu_1','sub_menu_2','sub_menu_3','sub_menu_4');
startList = function allclose() {
	for (i=0; i < id_menu.length; i++){
		document.getElementById(id_menu[i]).style.display = "none";
	}
}
function openMenu(id){
	for (i=0; i < id_menu.length; i++){
		if (id != id_menu[i]){
			document.getElementById(id_menu[i]).style.display = "none";
		}
	}
	if (document.getElementById(id).style.display == "block"){
		document.getElementById(id).style.display = "none";
	}else{
		document.getElementById(id).style.display = "block";
	}
}
window.onload=startList;