function NvScroll() {

this.version = "0.2";
this.name = "NvScroll";
this.item = new Array();
this.itemcount = 0;
this.currentspeed = 0;
this.scrollspeed = 50000;
this.pausedelay = 1000;
this.pausemouseover = false;
this.stop = false;
this.type = 1;
this.height = 100;
this.width = 100;
this.stopHeight=0;
this.i=0;

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

this.add2 = function () {
    var url = arguments[0];
    var title = arguments[1];
    this.item[this.itemcount] = "<a href=" + url + ">" + title + "</a>";
    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 () {
    document.write('<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++) {
        if ( this.type == 1) {
            document.write('<div id="'+this.name+'item'+i+'"style="left:0px; width:'+this.width+'; position:absolute; top:'+(this.height*i)+'px; ">');
            document.write(this.item[i]);
            document.write('</div>');
        } else if ( this.type == 2 ) {
            document.write('<div id="'+this.name+'item'+i+'"style="left:'+(this.width*i)+'px; width:'+this.width+'; position:absolute; top:0px; ">');
            document.write(this.item[i]);
            document.write('</div>');
       	}else if ( this.type == 3 ) {
            document.write('<div id="'+this.name+'item'+i+'"style="left:'+(this.width*i)+'px; width:'+this.width+'; position:absolute; top:0px; ">');
            document.write(this.item[i]);
            document.write('</div>');
       	}
    }
    document.write('</div>');
};

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 (i = 0; i < this.itemcount; i++) {
            obj = document.getElementById(this.name+'item'+i).style;
            if ( this.type == 1 ) {
                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;
            } else if ( this.type == 2 ) {
                obj.left = parseInt(obj.left) - 1;
                if ( parseInt(obj.left) <= this.width * (-1) ) obj.left = this.width * (this.itemcount-1);
                if ( parseInt(obj.left) == 0 ) this.currentspeed = this.pausedelay;
            }
        }
    }

        window.setTimeout(this.name+".scroll()",this.currentspeed);
    }
};

this.onmouseover = function () {
    if ( this.pausemouseover ) {
        this.stop = true;
    }
};

this.onmouseout = function () {
    if ( this.pausemouseover ) {
        this.stop = false;
    }
};

this.next = function() {
    this.stop = true;
    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.stop = false;
    this.pause = true;
}

/*this.prev = function() {
    this.stop = true;
    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.stop = false;
    this.pause = true;
}*/
this.prev = function() {
    this.stop = true;
    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.stop = false;
    this.pause = true;
}


}