function Slider(name) {
    this.leftValue = 0;
    this.rightValue = 1;
    this.defaultValue = 0;
    this.offsetX = 1;
    this.offsetY = 1;
    this.maxSlide = 258;
    this.buttonWidth = 40;
    this.buttonHeight = 28;
    this.buttonImg = "images/tele/slider.gif";
    this.buttonHiliteImg = "images/tele/sliderOver.gif";
    this.buttonHoverImg = null;
    this.imgPath = "";
    this.orientation = "h";
    this.writeSlider = Slider.writeSlider;
    this.placeSlider = Slider.placeSlider;
    this.makeEventHandler = Slider.makeEventHandler;
    this.isPrototype = Slider.isPrototype;
    this.getValue = Slider.getValue;
    this.setValue = Slider.setValue;
    this.MouseOver = Slider.MouseOver;
    this.MouseOut = Slider.MouseOut;
    this.MouseDown = Slider.MouseDown;
    this.MouseUp = Slider.MouseUp;
    this.MouseSlide = Slider.MouseSlide;
    this.onmouseover = null;
    this.onmouseout = null;
    this.onmousedown = null;
    this.onmouseup = null;
    this.onslide = null;
    this.onchange = null;
    this.onclick = null;
    if (!window.sliders)  window.sliders = new Array();
    this.name = name || "slider"+window.sliders.length;
    window.sliders[window.sliders.length] = this;
    window.sliders[this.name] = this;
    if (!window.sliderDrag)  window.sliderDrag = new Object();
}
Slider.writeSlider = function () {
	if (!document.getElementById) return; 
    var proto = this.prototype || this;
    if (!proto.loImg) {
        proto.loImg = new Image(proto.buttonWidth,proto.buttonHeight);
        proto.loImg.src = proto.imgPath + proto.buttonImg;
       if (proto.buttonHiliteImg) {
            proto.hiImg = new Image(proto.buttonWidth,proto.buttonHeight);
            proto.hiImg.src = proto.imgPath + (proto.buttonHiliteImg || proto.buttonImg);
        }
        if (proto.buttonHoverImg) {
            proto.hoImg = new Image(proto.buttonWidth,proto.buttonHeight);
            proto.hoImg.src = proto.imgPath + proto.buttonHoverImg;
        }
    }
    if (proto != this) {
        this.loImg = proto.loImg;
        if (proto.hiImg)  this.hiImg = proto.hiImg;
        if (proto.hoImg)  this.hoImg = proto.hoImg;
        this.orientation = proto.orientation;
        this.maxSlide = proto.maxSlide;
    }
    var style = '<STYLE TYPE="text/css"><!--\n' +
        '#'+this.name+'Button {visibility:hidden; position:absolute; width:'+ proto.buttonWidth +'px; height:'+ proto.buttonHeight +'px; z-index:1; }\n' +
        '--></STYLE>';
    var content = '<DIV ID="'+this.name+'Button">'+
        '<IMG ID="'+this.name+'ButtonImg" SRC="'+proto.loImg.src+'" WIDTH='+proto.buttonWidth+' HEIGHT='+proto.buttonHeight+'>'+
        '</DIV>';
	document.writeln(style);
	document.writeln(content);
	this.button = document.getElementById(this.name+"Button");
	this.button.img = document.getElementById(this.name+"ButtonImg");
	this.button.style.width = proto.buttonWidth + 'px';
	this.button.style.height = proto.buttonHeight + 'px';
	this.button.style.cursor = "pointer";
	if (this.button.addEventListener) {
		this.button.addEventListener("mousedown",this.MouseDown,false);
		this.button.addEventListener("mouseout",this.MouseOut,false);
		this.button.addEventListener("mouseover",this.MouseOver,false);
    } else {
        this.button.onmousedown = this.MouseDown;
        this.button.onmouseout = this.MouseOut;
        this.button.onmouseover = this.MouseOver;
    }
    this.onmouseover = this.makeEventHandler(this.onmouseover);
    this.onmouseout  = this.makeEventHandler(this.onmouseout);
    this.onmousedown = this.makeEventHandler(this.onmousedown);
    this.onmouseup   = this.makeEventHandler(this.onmouseup);
    this.onslide     = this.makeEventHandler(this.onslide);
    this.onchange    = this.makeEventHandler(this.onchange);
    this.onclick     = this.makeEventHandler(this.onclick);
    this.button.slider = this;
    this.button = this.button.style;
}
Slider.placeSlider = function (imgName) {
	if (!document.getElementById) return; 
    var proto = this.prototype || this;
    imgName = imgName || this.name+'RailImg';
    this.rail = (typeof(imgName) == 'string')? document.getElementById(imgName) : imgName;
    var x = proto.offsetX;
    var y = proto.offsetY;
    if (this.rail.offsetParent) {
        var parent = this.rail;
         while (parent) {
            x += parent.offsetLeft;
            y += parent.offsetTop;
            parent = parent.offsetParent;
        }
        if (navigator.userAgent.indexOf("MSIE")+1 && navigator.userAgent.indexOf("Mac")+1) {
            x += parseInt(document.body.currentStyle.marginLeft);
            y += parseInt(document.body.currentStyle.marginTop);
        }
    } else {
        x += (typeof(this.rail.pageX) == 'number')? this.rail.pageX : this.rail.x;
        y += (typeof(this.rail.pageY) == 'number')? this.rail.pageY : this.rail.y;
    }
    this.button.left = x + 'px';
    this.button.top = y + 'px';
    this.offset = (proto.orientation == "v")? y : x;
    this.setValue(this.defaultValue);
    this.button.visibility = 'inherit';
}
Slider.isPrototype = function () {
    for (var i=0; i<window.sliders.length; i++)  
        window.sliders[i].prototype = window.sliders[i].prototype || this;
}
Slider.MouseOver = function (e) {
    window.sliderDrag.isOver = true;
    if (this.slider.hoImg && !window.sliderDrag.isDown)  this.img.src = this.slider.hoImg.src;   
    if (this.slider.onmouseover)  this.slider.onmouseover(e);
}
Slider.MouseOut = function (e) {
    window.sliderDrag.isOver = false;
    if (this.slider.hoImg && !window.sliderDrag.isDown)  this.img.src = this.slider.loImg.src;   
    if (this.slider.onmouseout)  this.slider.onmouseout(e);
}
Slider.MouseDown = function (e) {
    var slider = this.slider;
    window.sliderDrag.dragLayer = this;
    window.sliderDrag.dragged = false;
    window.sliderDrag.isDown = true;
    var evtX = evtY = 0;
    if (!e) e = window.event;
    if (typeof(e.pageX) == 'number') {
        evtX = e.pageX;
        evtY = e.pageY;
    } else if (typeof(e.clientX) == 'number') {
        evtX = e.clientX + (document.body.scrollLeft || 0);
        evtY = e.clientY + (document.body.scrollTop || 0);
    }
    if ((e.which && e.which == 3) || (e.button && e.button == 2)) return true;
    // set starting offset of event
	window.sliderDrag.offX  =  evtX - parseInt(this.style.left) + slider.offset;
	window.sliderDrag.offY  =  evtY - parseInt(this.style.top) + slider.offset;
	if (e.cancelable) e.preventDefault();
	if (e.stopPropagation) e.stopPropagation();
	e.cancelBubble = true; 
    document.onmousemove = slider.MouseSlide;
    document.onmouseup = slider.MouseUp;
    if (document.captureEvents) document.captureEvents(Event.MOUSEMOVE|Event.MOUSEUP);
    if (slider.hiImg) this.img.src = slider.hiImg.src;
    if (slider.onmousedown)  slider.onmousedown(e);
    return false;
}
Slider.MouseUp = function (e) {
    var l = window.sliderDrag.dragLayer;
    var slider = l.slider;
    window.sliderDrag.isDown = false;
    document.onmousemove = null;
    document.onmouseup = null;
    if (document.releaseEvents) document.releaseEvents(Event.MOUSEMOVE|Event.MOUSEUP);
    window.sliderDrag.dragLayer = null;
    if (slider.hiImg) 
        l.img.src = (window.sliderDrag.isOver && slider.hoImg)? slider.hoImg.src : slider.loImg.src;
    if (slider.onmouseup)  slider.onmouseup(e);
    if (window.sliderDrag.dragged) {
        if (slider.onchange) slider.onchange(e);
    } else {
        if (slider.onclick) slider.onclick(e);
    }
    return false;
}
Slider.MouseSlide = function (e) {
    var l = window.sliderDrag.dragLayer;
    var slider = l.slider;
    window.sliderDrag.dragged = true;
    var evtX = evtY = 0;
    if (!e) e = window.event;
    if (typeof(e.pageX) == 'number') {
        evtX = e.pageX;
        evtY = e.pageY;
    } else if (typeof(e.clientX) == 'number') {
        evtX = e.clientX + (document.body.scrollLeft || 0);
        evtY = e.clientY + (document.body.scrollTop || 0);
    }
    var pos = (slider.orientation == "h")? 
        Math.max(Math.min(evtX - window.sliderDrag.offX,slider.maxSlide),0) + slider.offset :
        Math.max(Math.min(evtY - window.sliderDrag.offY,slider.maxSlide),0) + slider.offset;
	if (slider.orientation == "h")  l.style.left = pos + 'px';
	else  l.style.top = pos + 'px';
	if (e.cancelable) e.preventDefault();
	if (e.stopPropagation) e.stopPropagation();
	e.cancelBubble = true;
    if (slider.onchange)  slider.onchange(e);
    if (slider.onslide)  slider.onslide(e);
    return false;
}
Slider.getValue = function (n) {
    var pos = (this.orientation == "h")? parseInt(this.button.left) : parseInt(this.button.top);
    var val =  this.leftValue + (this.rightValue-this.leftValue) * (pos-this.offset) / this.maxSlide;
    return (typeof(n) == 'number')?  toDecimals(val,n) :  val;
}
Slider.setValue = function (value,ignore) {
    if (typeof(value) == 'string')  value = parseFloat(value);
    if (isNaN(value))  value = this.defaultValue;
    var rangeValue = (this.rightValue >= this.leftValue)? 
        Math.min(Math.max(value,this.leftValue),this.rightValue) - this.leftValue : 
        Math.max(Math.min(value,this.leftValue),this.rightValue) - this.leftValue;
    var pos = this.maxSlide * rangeValue / (this.rightValue-this.leftValue) + this.offset + 'px';
	if (this.orientation == "h")  this.button.left = pos;
	else  this.button.top = pos;
    if (this.onchange && (!ignore))  this.onchange(null);
}
Slider.makeEventHandler = function (f) {
    return (typeof(f) == 'string')? new Function('e',f) : ((typeof(f) == 'function')? f : null);
}
function toDecimals(val,n) {
    if (isNaN(n)) return val;
    for (var m=0; m<n; m++)  val *= 10;
    for (var m=0; m>n; m--) val *= 0.1;
    val = Math.round(val);
    if (val < 0) {
        val = -val;
        var sgn = "-";
    } else {
        var sgn = "";
    }
    var valstr = val.toString();
    if (n>0) {
        while (valstr.length<=n) valstr = "0"+valstr;
        var len = valstr.length;
        valstr = valstr.substring(0,len-n) +"."+ valstr.substring(len-n,len);
    } else if (n<0) {
        for (m=0; m>n; m--) valstr = valstr+"0";
    }
    return sgn+valstr;
}