function TextScroll(scrollname, id)
{
	var div_name = 'scrollblock'+id; 
	var up_name = 'scroll_up'+id;
	var down_name = 'scroll_down'+id; 
	var scrollbar = 'scrollbar'+id;
	var scrollheight = 'scrollheight'+id;
	
    this.div_name = div_name;
    this.name = scrollname;
    this.scrollCursor = 0;
    this.speed = 5;
	this.speedStep = 20;
    this.timeoutID = 0;
    this.div_obj = null;
    this.up_name = up_name;
    this.dn_name = down_name;

	{

		if (document.getElementById) 
		{
			div_obj = document.getElementById(this.div_name);
			if (div_obj) 
			{
				this.div_obj = div_obj;
				this.div_obj.style.overflow = 'hidden';
			}
			div_up_obj = document.getElementById(this.up_name);
			div_dn_obj = document.getElementById(this.dn_name);
			if (div_up_obj && div_dn_obj) 
			{
				div_up_obj.onmouseover = function() { eval(scrollname + ".scrollUp();") };
				div_up_obj.onmouseout = function() { eval(scrollname + ".stopScroll();") };
				div_dn_obj.onmouseover = function() { eval(scrollname + ".scrollDown();") };
				div_dn_obj.onmouseout = function() { eval(scrollname + ".stopScroll();") };
				
												
				/*div_up_obj.onmousedown = function() { eval(scrollname + ".scrollUp();") };
				div_up_obj.onmouseup = function() { eval(scrollname + ".stopScroll();") };
				div_up_obj.onmouseout = function() { eval(scrollname + ".stopScroll();") };				
				div_dn_obj.onmousedown = function() { eval(scrollname + ".scrollDown();") };
				div_dn_obj.onmouseup = function() { eval(scrollname + ".stopScroll();") };
				div_dn_obj.onmouseout = function() { eval(scrollname + ".stopScroll();") };
				*/
			}
		}
    }

	this.stopScroll = function() {
        clearTimeout(this.timeoutID);
    }

	this.scrollUp = function() {
        if (this.div_obj) {
            this.scrollCursor = (this.scrollCursor - this.speed) < 0 ? 0 : this.scrollCursor - this.speed;
            this.div_obj.scrollTop = this.scrollCursor;
            this.timeoutID = setTimeout(this.name + ".scrollUp()", 60);
        }
    }

	this.scrollDown = function() {
		if (this.div_obj) {
			this.scrollCursor += this.speed;
			this.div_obj.scrollTop = this.scrollCursor;
			if (this.div_obj.scrollTop == this.scrollCursor) {
				this.timeoutID = setTimeout(this.name + ".scrollDown()", 60);
			} else {
				this.scrollCursor = this.div_obj.scrollTop;
			}
		}
	}
	
	this.resetScroll = function() {
		if (this.div_obj) {
			this.div_obj.scrollTop = 0;
			this.scrollCursor = 0;
		}
	}	
	
	/**/
	
	this.scrollUpStep = function() {
        if (this.div_obj) {
            this.scrollCursor = (this.scrollCursor - this.speedStep) < 0 ? 0 : this.scrollCursor - this.speedStep;
            this.div_obj.scrollTop = this.scrollCursor;            
        }
    }
	
	this.scrollDownStep = function() {
		if (this.div_obj) {
			this.scrollCursor += this.speedStep;
			this.div_obj.scrollTop = this.scrollCursor;
			this.scrollCursor = this.div_obj.scrollTop;		
		}
	}
	
	/**/

	if (document.getElementById(scrollheight)) 
	{
		if (document.getElementById(scrollheight).offsetHeight < document.getElementById(this.div_name).offsetHeight)
		{
			document.getElementById(this.up_name).style.display = "none";
			document.getElementById(this.dn_name).style.display = "none";
		}
		else
		{
			document.getElementById(this.up_name).style.display = "inline";
			document.getElementById(this.dn_name).style.display = "inline";
		}
	}
	else
	{
		document.getElementById(this.up_name).style.display = "inline";
		document.getElementById(this.dn_name).style.display = "inline";
	}
	
}


var triggered = "";
	
function wheel(event)
{
	var delta = 0;
	if (!event) /* For IE. */
			event = window.event;
	if (event.wheelDelta) { /* IE/Opera. */
		delta = event.wheelDelta/120;
		if (window.opera)
			delta = -delta;
	} else if (event.detail) { /** Mozilla case. */
		delta = -event.detail/3;
	}
	
	scrollname = 'div_scroll_'+triggered;
	
	if (delta>0)	//up
		eval(scrollname + ".scrollUpStep();");
	else	//down
		eval(scrollname + ".scrollDownStep();");
	
}

$(function()
{
	$("[id^='scrollblock']").mouseover(function() {
		triggered = this.id.replace("scrollblock","");
		if (window.addEventListener)
			window.addEventListener('DOMMouseScroll', wheel, false);
		document.onmousewheel = wheel;			
	}).mouseout(function(){
		if (window.removeEventListener)
			window.removeEventListener('DOMMouseScroll', wheel, false);
		document.onmousewheel = null;
	});

});