function checkBrowser(){
        this.ver=navigator.appVersion
        this.dom=document.getElementById?1:0
        this.ie6=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0;
        this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0;
        this.ie4=(document.all && !this.dom)?1:0;
        this.ns5=(this.dom && parseInt(this.ver) >= 5) ?1:0;
        this.ns4=(document.layers && !this.dom)?1:0;
        this.bw=(this.ie5 || this.ie4 || this.ns4 || this.ns5)
        return this
}
bw=new checkBrowser();
var speed=50;
var loop, timer;


function understandable_makeObj(obj,nest){

	// nest=(!nest) ? '':'document.'+nest+'.'
	//
	if(!nest) {
		nest = '';
	}
	else {
		nest = "document."+nest+".";
	}

	//this.el=bw.dom?document.getElementById(obj):bw.ie4?document.all[obj]:bw.ns4?eval(nest+'document.'+obj):0;
	//
	if(bw.dom) {
		this.el = document.getElementById(obj);
	}
	else if(bw.ie4) {
		this.el = document.all[obj];
	}
	else if(bw.ns4) {
		this.el = eval(nest+'document.'+obj);
	}
	else {
		this.el = 0;
	}

	//this.css = 0;
	// 
	this.css=bw.dom?document.getElementById(obj).style:bw.ie4?document.all[obj].style:bw.ns4?eval(nest+'document.'+obj):0;
	//
	if(bw.dom) {
		this.css = document.getElementById(obj).style;
	}
	else if(bw.ie4) {
		this.css = document.all[obj].style;
	}
	else if(bw.ns4) {
		this.css = eval(nest+'document.'+obj);
	}
	else {
		this.css = 0;
	}

	// this.scrollHeight=bw.ns4?this.css.document.height:this.el.offsetHeight
	//
	if(bw.ns4) {
		this.scrollHeight = this.css.document.height;
	}
	else {
		// alert(this.el.offsetHeight);
		this.scrollHeight = this.el.offsetHeight;
	}

	// this.clipHeight=bw.ns4?this.css.clip.height:this.el.offsetHeight
	//
	if(bw.ns4) {
		this.clipHeight = this.css.clip.height;
	}
	else {
		this.clipHeight = this.el.offsetHeight;
	}

	this.up=goUp;
	this.down=goDown;
	this.moveIt=moveIt;
	this.x;
	this.y;
	this.obj = obj + "Object";

	eval(this.obj + "=this");

	return this;
}


function moveIt(x,y){
	this.x=x;
	this.y=y;
	this.css.left=this.x;
	this.css.top=this.y;
}

function goDown(move){
	if(this.y>-this.scrollHeight+oCont.clipHeight) {
		this.moveIt(0,this.y-move);
		if(loop) {
			setTimeout(this.obj+".down("+move+")",speed);
		}
	}
}

function goUp(move){
	if(this.y<0){
		this.moveIt(0,this.y-move);
		if(loop) {
			setTimeout(this.obj+".up("+move+")",speed);
		}
	}
}

function scroll(speed, obj){
	if(loaded){
		loop=true;
		if(speed>0) {
			if(bw.ns4) {
				obj.down(2*speed);
			}
			else {
				obj.down(speed);
			}
		}
		else {
			if(bw.ns4) {
				obj.up(2*speed);
			}
			else {
				obj.up(speed);
			}
		}
	}
}

function noScroll(){
	loop=false;
	if(timer) {
		clearTimeout(timer);
	}
}

var loaded;