/************************************************************************************************************
	(C) www.dhtmlgoodies.com, September 2005
	
	This is a script from www.dhtmlgoodies.com. You will find this and a lot of other scripts at our website.	
	
	Terms of use:
	You are free to use this script as long as the copyright message is kept intact. However, you may not
	redistribute, sell or repost it without our permission.
	
	Thank you!
	
	www.dhtmlgoodies.com
	Alf Magne Kalleland
	
	************************************************************************************************************/	
	var contentHeight = 0; 	// The total height of the content
	var visibleContentHeight = 0;	
	var scrollActive = false;
	
	var scrollHandleObj = false; // reference to the scroll handle
	var scrollHandleHeight = false;
	var scrollbarTop = false;
	var eventYPos = false;

	var scrollbuttonActive = false;
	var scrollbuttonDirection = false;
	var scrollbuttonSpeed = 2; // How fast the content scrolls when you click the scroll buttons(Up and down arrows)
	var scrollTimer = 10;	// Also how fast the content scrolls. By decreasing this value, the content will move faster	
	
	var scrollMoveToActive = false;
	var scrollMoveToYPosition = false;
	
	var operaBrowser = false;
	if(navigator.userAgent.indexOf('Opera')>=0)operaBrowser=1;
		
	function scrollDiv_startScroll(e)
	{
		if(document.all && !operaBrowser)e = event;
		scrollbarTop = document.getElementById('scrolldiv_theScroll').offsetTop;
		eventYPos = e.clientY;
		scrollActive = true;
	}
	
	function scrollDiv_stopScroll()
	{
		scrollActive = false;
		scrollbuttonActive = false;
		scrollMoveToActive = false;
	}
	function scrollDiv_scroll(e)
	{
		if(typeof(scrollActive)=='undefined'||!scrollActive)return;
		if(document.all && !operaBrowser)e = event;
		if(e.button!=1 && document.all)return;
		var topPos = scrollbarTop + e.clientY - eventYPos; 
		if(topPos<0)topPos=0;
		if(topPos/1>visibleContentHeight-(scrollHandleHeight+4)/1)topPos = visibleContentHeight-(scrollHandleHeight+4);
		document.getElementById('scrolldiv_theScroll').style.top = topPos + 'px';
		document.getElementById('scrolldiv_content').style.top = 0 - Math.floor((contentHeight) * ((topPos)/(visibleContentHeight-scrollHandleHeight)))+'px' 
	}
	
	/*
	Click on the slider
	Move the content to the this point
	*/
	function scrolldiv_scrollMoveToInit(e)
	{		
		if(document.all && !operaBrowser)e = event;
		scrollMoveToActive = true;
		scrollMoveToYPosition = e.clientY - document.getElementById('scrolldiv_scrollbar').offsetTop;
		if(document.getElementById('scrolldiv_theScroll').offsetTop/1 > scrollMoveToYPosition) scrollbuttonDirection = scrollbuttonSpeed*-2; else  scrollbuttonDirection = scrollbuttonSpeed*2;
		scrolldiv_scrollMoveTo();	
	}
	
	function scrolldiv_scrollMoveTo()
	{
		if(!scrollMoveToActive || scrollActive)return;
		var topPos = document.getElementById('scrolldiv_theScroll').style.top.replace('px','');
		topPos = topPos/1 + scrollbuttonDirection;
		if(topPos<0){
			topPos=0;
			scrollMoveToActive=false;
		}
		if(topPos/1>visibleContentHeight-(scrollHandleHeight+4)/1){
			topPos = visibleContentHeight-(scrollHandleHeight+4);	
			scrollMoveToActive=false;
		}
		if(scrollbuttonDirection<0 && topPos<scrollMoveToYPosition-scrollHandleHeight/2)return;	
		if(scrollbuttonDirection>0 && topPos>scrollMoveToYPosition-scrollHandleHeight/2)return;			
		document.getElementById('scrolldiv_theScroll').style.top = topPos + 'px';
		document.getElementById('scrolldiv_content').style.top = 0 - Math.floor((contentHeight) * ((topPos)/(visibleContentHeight-scrollHandleHeight)))+'px' 		
		setTimeout('scrolldiv_scrollMoveTo()',scrollTimer);		
	}
	
	function cancelEvent()
	{
		return false;			
	}

	function scrolldiv_scrollButton()
	{
		if(this.id=='scrolldiv_scrollDown')scrollbuttonDirection = scrollbuttonSpeed; else scrollbuttonDirection = scrollbuttonSpeed*-1;
		scrollbuttonActive=true;
		scrolldiv_scrollButtonScroll();
	}
	function scrolldiv_scrollButtonScroll()
	{
		if(!scrollbuttonActive)return;
		var topPos = document.getElementById('scrolldiv_theScroll').style.top.replace('px','');
		topPos = topPos/1 + scrollbuttonDirection;
		if(topPos<0){
			topPos=0;
			scrollbuttonActive=false;
		}
		if(topPos/1>visibleContentHeight-(scrollHandleHeight+4)/1){
			topPos = visibleContentHeight-(scrollHandleHeight+4);	
			scrollbuttonActive=false;
		}	
		document.getElementById('scrolldiv_theScroll').style.top = topPos + 'px';
		document.getElementById('scrolldiv_content').style.top = 0 - Math.floor((contentHeight) * ((topPos)/(visibleContentHeight-scrollHandleHeight)))+'px' 			
		setTimeout('scrolldiv_scrollButtonScroll()',scrollTimer);
	}
	function scrolldiv_scrollButtonStop()
	{
		scrollbuttonActive = false;
	}

var scrollW=true;
	
	function scrolldiv_initScroll()
	{	
		if (! document.getElementById('dhtmlgoodies_scrolldiv')) return;
		
		/** Initialization code. 
		 * If you use your own event management code, change it as required.
		 */
		if (window.addEventListener)
				/** DOMMouseScroll is for mozilla. */
				window.addEventListener('DOMMouseScroll', wheel, false);
		/** IE/Opera. */
		window.onmousewheel = document.onmousewheel = wheel;
		
		// XXXX
		visibleContentHeight = document.getElementById('scrolldiv_scrollbar').offsetHeight ;
		// XXXX
		contentHeight = document.getElementById('scrolldiv_content').offsetHeight - visibleContentHeight;	
		
				if (contentHeight<=0 ) {
				//alert('off:'+document.getElementById('scrolldiv_content').offsetHeight+' '+visibleContentHeight);
				document.getElementById('scrolldiv_slider').style.visibility = 'hidden';	
				scrollW=false;
				}else{
				//alert('on:'+document.getElementById('scrolldiv_content').offsetHeight+' '+visibleContentHeight);
				document.getElementById('scrolldiv_slider').style.visibility = 'visible';	
				scrollW=true;
				}
				
		scrollHandleObj = document.getElementById('scrolldiv_theScroll');
		scrollHandleHeight = scrollHandleObj.offsetHeight;
		scrollbarTop = document.getElementById('scrolldiv_scrollbar').offsetTop;		
		document.getElementById('scrolldiv_theScroll').onmousedown = scrollDiv_startScroll;
		document.body.onmousemove = scrollDiv_scroll;
		document.getElementById('scrolldiv_scrollbar').onselectstart = cancelEvent;
		document.getElementById('scrolldiv_theScroll').onmouseup = scrollDiv_stopScroll;
		if(document.all)document.body.onmouseup = scrollDiv_stopScroll; else document.documentElement.onmouseup = scrollDiv_stopScroll;
		document.getElementById('scrolldiv_scrollDown').onmousedown = scrolldiv_scrollButton;
		document.getElementById('scrolldiv_scrollUp').onmousedown = scrolldiv_scrollButton;
		document.getElementById('scrolldiv_scrollDown').onmouseup = scrolldiv_scrollButtonStop;
		document.getElementById('scrolldiv_scrollUp').onmouseup = scrolldiv_scrollButtonStop;
		document.getElementById('scrolldiv_scrollUp').onselectstart = cancelEvent;
		document.getElementById('scrolldiv_scrollDown').onselectstart = cancelEvent;
		document.getElementById('scrolldiv_scrollbar').onmousedown = scrolldiv_scrollMoveToInit;
		
	}
	/*
	Change from the default color
	*/	
	function scrolldiv_setColor(rgbColor)
	{
		document.getElementById('scrolldiv_scrollbar').style.borderColor = rgbColor;
		document.getElementById('scrolldiv_theScroll').style.backgroundColor = rgbColor;
		document.getElementById('scrolldiv_scrollUp').style.borderColor = rgbColor;
		document.getElementById('scrolldiv_scrollDown').style.borderColor = rgbColor;
		document.getElementById('scrolldiv_scrollUp').style.color = rgbColor;
		document.getElementById('scrolldiv_scrollDown').style.color = rgbColor;
		document.getElementById('scrolldiv_parentContainer').style.borderColor = rgbColor;
	}
	/*
	Setting total width of scrolling div
	*/
	function scrolldiv_setWidth(newWidth)
	{
		document.getElementById('dhtmlgoodies_scrolldiv').style.width = newWidth + 'px';
		document.getElementById('scrolldiv_parentContainer').style.width = newWidth-30 + 'px';		
	}
	
	/*
	Setting total height of scrolling div
	*/
	function scrolldiv_setHeight(newHeight)
	{
		document.getElementById('dhtmlgoodies_scrolldiv').style.height = newHeight + 'px';
		document.getElementById('scrolldiv_parentContainer').style.height = newHeight + 'px';
		document.getElementById('scrolldiv_slider').style.height = newHeight + 'px';
		document.getElementById('scrolldiv_scrollbar').style.height = newHeight-40 + 'px';		
	}
	/*
	Setting new background color to the slider 
	*/
	function setSliderBgColor(rgbColor)
	{
		document.getElementById('scrolldiv_scrollbar').style.backgroundColor = rgbColor;
		document.getElementById('scrolldiv_scrollUp').style.backgroundColor = rgbColor;
		document.getElementById('scrolldiv_scrollDown').style.backgroundColor = rgbColor;
	}
	/*
	Setting new content background color
	*/
	function setContentBgColor(rgbColor)
	{
		document.getElementById('scrolldiv_parentContainer').style.backgroundColor = rgbColor;
	}
	
	/*
	Setting scroll button speed
	*/
	function setScrollButtonSpeed(newScrollButtonSpeed)
	{
		scrollbuttonSpeed = newScrollButtonSpeed;
	}
	/*
	Setting interval of the scroll
	*/
	function setScrollTimer(newInterval)
	{
		scrollTimer = newInterval;
	}
	
	///////// pour handle la molette de la souris ///////
	
	/** This is high-level function.
	 * It must react to delta being more/less than zero.
	 */
	 
	function scrolldiv_scrollWheel(delta)
	{
		if (scrollbuttonActive|| !scrollW) return;
		
		if (delta>0) scrollbuttonDirection = scrollbuttonSpeed*-1; 
		else scrollbuttonDirection = scrollbuttonSpeed;
		
	scrollbuttonActive=true;
	scrolldiv_scrollButtonScroll();
	} 
	 
	/** Event handler for mouse wheel event.
	 */
	function wheel(event){
			var delta = 0;
			if (!event) /* For IE. */
					event = window.event;
			if (event.wheelDelta) { /* IE/Opera. */
					delta = event.wheelDelta/120;
					/** In Opera 9, delta differs in sign as compared to IE.
					 */
					if (window.opera)
							delta = -delta;
			} else if (event.detail) { /** Mozilla case. */
					/** In Mozilla, sign of delta is different than in IE.
					 * Also, delta is multiple of 3.
					 */
					delta = -event.detail/3;
			}
			/** If delta is nonzero, handle it.
			 * Basically, delta is now positive if wheel was scrolled up,
			 * and negative, if wheel was scrolled down.
			 */
			if (delta)
					scrolldiv_scrollWheel(delta);
			/** Prevent default actions caused by mouse wheel.
			 * That might be ugly, but we handle scrolls somehow
			 * anyway, so don't bother here..
			 */
			 
			if (event.preventDefault)
					event.preventDefault();
					
		event.returnValue = false;
	
	//pour etre compatible avec scrolldiv, et car aucun évenement ne correspond
	//à l'arret de l'utilisation de la molette de la souris
	setTimeout('scrollbuttonActive=false;',350);	
	}
	
	function refreshScrollBar() {
		scrolldiv_setColor('#317082');	// Setting color of the scrolling div
		setSliderBgColor('#E2EBED');	// Setting color of the scrolling div
		setContentBgColor('#CCCCCC');	// Setting color of the scrolling div
		setScrollButtonSpeed(2);	// Setting speed of scrolling when someone clicks on the arrow or the slider
		setScrollTimer(2);	// speed of 1 and timer of 5 is the same as speed of 2 and timer on 10 - what's the difference? 1 and 5 will make the scroll move a little smoother.
		scrolldiv_setWidth(385);	// Setting total width of scrolling div
		scrolldiv_setHeight(350);	// Setting total height of scrolling div
		//alert('off:'+document.getElementById('scrolldiv_content').offsetHeight);
		scrolldiv_initScroll();	// Initialize javascript functions
	}