function Obj(lgh,imgname,directory,add,typ){
	if(!document.images) return;
	var dir=directory+'images/'+imgname; this.imgname=imgname; this.lgh=lgh;
	if(typ=='rollover'){
		this.images=new Array(lgh);
		for(var i=0; i < lgh; i++){
			this.images[i]=new Object(); this.images[i].on=new Image(); this.images[i].off=new Image(); this.images[i].on.src=dir+(i+1)+'_on.'+add; this.images[i].off.src=dir+(i+1)+'_off.'+add;
		}
	}else if(typ=='toggle'){
		this.images=new Object(); this.images.on=new Image(); this.images.off=new Image(); this.images.on.src=dir+'_on.'+add; this.images.off.src=dir+'_off.'+add;
	}
	return this;
}
new Obj(0,'','','',''); //for N2,N3
Obj.prototype.rollon=Obj_rollon; Obj.prototype.rolloff=Obj_rolloff; Obj.prototype.toggle=Obj_toggle;
function Obj_rollon(n){
	if(!document.images) return false;
	else document[this.imgname+n].src=this.images[n-1].on.src;
}
function Obj_rolloff(n){
	if(!document.images) return false;
	else document[this.imgname+n].src=this.images[n-1].off.src;
}
function Obj_toggle(n,val){
	var filename;
	if(!document.images) return false;
	else{
		filename=this.imgname+'_'+n;
		if(val=='on') document[filename].src=this.images.on.src;
		else if(val=='off') document[filename].src=this.images.off.src;
		else{if(document[filename].src==this.images.off.src){document[filename].src=this.images.on.src;}
			else document[filename].src=this.images.off.src;
		}
	}
}
function initializeVariable(){
	if(!document.getElementsByTagName) return;
	var objs=document.getElementsByTagName('div');
	for(var i=0;i<objs.length;i++){if(objs[i].className=='itemblock') objs[i].style.display='none';}
	prelev1=null; prelev2=null;
}
var prelev1=null,prelev2=null,prenum1,prenum2;
function setMenu(){
	if(!document.getElementsByTagName) return false;
	var n=arguments[0]; var lev1=(arguments.length==1?true:false);
	var obj=document.getElementById('leftmenu'+(lev1?n :arguments[1]+'_'+n));
	var objname=(lev1?level1:level2); var prelev=(lev1?prelev1:prelev2);
	var prenum=(lev1?prenum1:prenum2); var filename=''+objname+'_'+n;
	if(prelev==null){obj.style.display='block'; objname.toggle(n,'on');}
	else if(prelev==obj){
		if(obj.style.display=='block'){obj.style.display='none'; objname.toggle(n,'any');}
		else{obj.style.display='block'; objname.toggle(n,'on');}
	}else{prelev.style.display='none'; objname.toggle(prenum,'off'); obj.style.display='block'; objname.toggle(n,'on');}
	if(lev1){prenum1=n; prelev1=obj;}
	else{prenum2=n; prelev2=obj;}
	return false;
}