function NvScroll() {
	this.version = "0.2";
	this.name = "NvScroll";
	this.divId = "list";
	this.item = new Array();
	this.itemcount = 0;
	this.currentspeed = 0;
	this.scrollspeed = 50;
	this.pausedelay = 1000;
	this.pausemouseover = false;
	this.stop = false;
	this.height = 100;
	this.width = 100;
	this.stopHeight=0;
	this.i=0;
	this.reloadData = 0;

	this.add = function () {
		var text = arguments[0];
		this.item[this.itemcount] = text;
		this.itemcount = this.itemcount + 1;
	};

	this.start = function () {
		if ( this.itemcount == 1 ) {
			this.add(this.item[0]);
		}
		this.display();
		this.currentspeed = this.scrollspeed;
		this.stop = true;
		setTimeout(this.name+'.scroll()',this.currentspeed);
		window.setTimeout(this.name+".stop = false", this.pausedelay);
	};
	
	this.display = function () {
        var htmlCode;
		htmlCode = '<div id="'+this.name+'" style="height:'+this.height+'; width:'+this.width+'; position:relative; overflow:hidden; " OnMouseOver="'+this.name+'.onmouseover(); " OnMouseOut="'+this.name+'.onmouseout(); ">';
		for(var i = 0; i < this.itemcount; i++) {
			htmlCode += '<div id="'+this.name+'item'+i+'"style="left:0px; width:'+this.width+'; position:absolute; top:'+(this.height*i)+'px; ">';
			htmlCode += this.item[i];
			htmlCode += '</div>';
		}
		htmlCode += '</div>';

        document.getElementById(this.divId).innerHTML=htmlCode;  
	};
	
	this.scroll = function () {
		if ( this.pause == true ) {
			window.setTimeout(this.name+".scroll()",this.pausedelay);
			this.pause = false;
		} else {
			this.currentspeed = this.scrollspeed;
			if ( !this.stop ) {
				for (var i = 0; i < this.itemcount; i++) {
					obj = document.getElementById(this.name+'item'+i).style;
					obj.top = parseInt(obj.top) - 1;
					if ( parseInt(obj.top) <= this.height * (-1) ) obj.top = this.height * (this.itemcount-1);
					if ( parseInt(obj.top) == 0 ) {
						this.currentspeed = this.pausedelay;
						this.i = i;
					}
				}
			}
            if( !this.stop && i == this.itemcount && parseInt(obj.top) == 0 && this.reloadData == 1 ) {
				this.reloadData = 0;
            }
            else {
				window.setTimeout(this.name+".scroll()",this.currentspeed);
            }
		}
	};
	
	this.rolling = function () {
		if ( this.stop == false  ) {
			this.next();
		}
		window.setTimeout(this.name+".rolling()",this.scrollspeed);
	}
	
	this.onmouseover = function () {
		msg('RankMsg');
		if ( this.pausemouseover ) {
			this.stop = true;
		}
	};
	
	this.onmouseout = function () {
		if ( this.pausemouseover ) {
			this.stop = false;
		}
	};
	
	this.next = function() {
	
		for (i = 0; i < this.itemcount; i++) {
			obj = document.getElementById(this.name+'item'+i).style;
			if ( parseInt(obj.left) < 1 ) { 
				width = this.width + parseInt(obj.left);
				break;
			}
		}
		for (i = 0; i < this.itemcount; i++) {
			obj = document.getElementById(this.name+'item'+i).style;
			if ( parseInt(obj.left) < 1 ) { 
				obj.left = this.width * (this.itemcount-1);
			} else {
				obj.left = parseInt(obj.left) - width;
			}
		}
	
	}
	
	this.prev = function() {
	
		for (i = 0; i < this.itemcount; i++) {
			obj = document.getElementById(this.name+'item'+i).style;
			if ( parseInt(obj.left) < 1 ) { 
				width = parseInt(obj.left) * (-1);
				break;
			}
		}
		if ( width == 0 ) {
			total_width = this.width * (this.itemcount-1);
			for (i = 0; i < this.itemcount; i++) {
				obj = document.getElementById(this.name+'item'+i).style;
				if ( parseInt(obj.left) + 1 > total_width ) { 
					obj.left = 0;
				} else {
					obj.left = parseInt(obj.left) + this.width;
				}
			}
		} else {
			for (i = 0; i < this.itemcount; i++) {
				obj = document.getElementById(this.name+'item'+i).style;
				if ( parseInt(obj.left) < 1 ) { 
					obj.left = 0;
				} else {
					obj.left = parseInt(obj.left) + width;
				}
			}
		}
	}
	
	this.unext = function () {
		this.onmouseover();
		this.next();
		window.setTimeout(this.name+".onmouseout()",this.pausedelay);
	}
	
	this.uprev = function () {
		this.onmouseover();
		this.prev();
		window.setTimeout(this.name+".onmouseout()",this.pausedelay);
	}
}

var msg_hidden_idle=null;
function msg(id) {
	if(navigator.userAgent.indexOf("Opera")>-1) return;
	if(msg_hidden_idle) {
		clearInterval(msg_hidden_idle);
	}

	if(id) {
		var mid=document.getElementById(id);
		mid.style.display='';
		mid.style.visibility='visible';
	}
}

function msg_hidden(id,f) {
	if(navigator.userAgent.indexOf("Opera")>-1) return;
	if(f==1) {
		hidden(id);
	}else{
		msg_hidden_idle=setInterval("hidden('"+id+"')",100);
	}
}

function hidden(id) {
	var mid=document.getElementById(id);
	mid.style.display='none';
	mid.style.visibility='hidden';
}