/***********************************************
* CMotion Image Gallery- © Dynamic Drive DHTML code library (www.dynamicdrive.com)
* Visit http://www.dynamicDrive.com for source code
* This copyright notice must stay intact for legal use
* Modified for autowidth and optional starting positions in
* http://www.dynamicdrive.com/forums/showthread.php?t=11839 by jschuer1 8/5/06
***********************************************/

 //1) Set width of the "neutral" area in the center of the gallery.
var restarea=6;
 //2) Set top scroll speed in pixels. Script auto creates a range from 0 to top speed.
var maxspeed=7;
 //3) Set to maximum width for gallery - must be less than the actual length of the image train.
var maxwidth=1000;
 //4) Set to 1 for left start, 0 for right, 2 for center.
var startpos=0;

////NO NEED TO EDIT BELOW THIS LINE////////////

var iedom=document.all||document.getElementById, scrollspeed=0, movestate='', actualwidth='', cross_scroll, ns_scroll, loadedyes=0, lefttime, righttime, lefthandle, righthandle;

function ietruebody(){
return (document.compatMode && document.compatMode!='BackCompat')? document.documentElement : document.body;
}

function getposOffset(what, offsettype){
var totaloffset=(offsettype=='left')? what.offsetLeft: what.offsetTop;
var parentEl=what.offsetParent;
while (parentEl!=null){
totaloffset=(offsettype=='left')? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
parentEl=parentEl.offsetParent;
}
return totaloffset;
}

function moveleft(){
	if (loadedyes){
		movestate='left';
		if (iedom&&parseInt(cross_scroll.style.left)>(menuwidth-actualwidth)){
			cross_scroll.style.left=parseInt(cross_scroll.style.left)-scrollspeed+'px';
		} else {
			handles('hidden')
		}
		lefttime=setTimeout('moveleft()',10);
	}
}

function moveright(){
	if (loadedyes){
		movestate='right';
		if (iedom&&parseInt(cross_scroll.style.left)<0){
			cross_scroll.style.left=parseInt(cross_scroll.style.left)+scrollspeed+'px';
		} else {
			handles('hidden')
		}
		righttime=setTimeout('moveright()',10);
	}
}

function motionengine(e){
var mainobjoffset=getposOffset(crossmain, 'left'),
dsocx=(window.pageXOffset)? pageXOffset: ietruebody().scrollLeft,
dsocy=(window.pageYOffset)? pageYOffset : ietruebody().scrollTop,
curposy=window.event? event.clientX : e.clientX? e.clientX: '';
curposy-=mainobjoffset-dsocx;
var leftbound=(menuwidth-restarea)/2;
var rightbound=(menuwidth+restarea)/2;
if (curposy>rightbound){
scrollspeed=(curposy-rightbound)/((menuwidth-restarea)/2) * maxspeed;
clearTimeout(righttime);
if (movestate!='left') moveleft();
}
else if (curposy<leftbound){
scrollspeed=(leftbound-curposy)/((menuwidth-restarea)/2) * maxspeed;
clearTimeout(lefttime);
if (movestate!='right') moveright();
}
else
scrollspeed=0;
}

function contains_ns6(a, b) {
if (b!==null)
while (b.parentNode)
if ((b = b.parentNode) == a)
return true;
return false;
}

function stopmotion(e){
	if (!window.opera||(window.opera&&e.relatedTarget!==null))
		if ((window.event&&!crossmain.contains(event.toElement)) || (e && e.currentTarget && e.currentTarget!= e.relatedTarget && !contains_ns6(e.currentTarget, e.relatedTarget))){
			clearTimeout(lefttime);
			clearTimeout(righttime);
			movestate='';
		}
}

function fillup(){
	if (iedom){
		crossmain=document.getElementById? document.getElementById('cmotiongallerycontainer') : document.all.cmotiongallerycontainer;
		if (!crossmain) return;
		if(typeof crossmain.style.maxWidth!=='undefined')
			crossmain.style.maxWidth=maxwidth+'px';
		menuwidth=crossmain.offsetWidth;
		cross_scroll=document.getElementById? document.getElementById('cmotiongallery') : document.all['cmotiongallery'];
		actualwidth=document.getElementById? document.getElementById('cmotiongallery-content').offsetWidth : document.all['cmotiongallery-content'].offsetWidth;
		//UPDATE 2008-10-28
		//Fixed to initialy set left to 0 if startpos is 0
		//Problem with CSS defining left instead of in HTML element style. Empty string or NaN was returned when calling cross_scroll.style.left
		cross_scroll.style.left=startpos? (menuwidth-actualwidth)/startpos+'px' : 0;
		lefthandle=document.getElementById? document.getElementById('cmotiongallery-lefthandle') : document.all['cmotiongallery-lefthandle'];
		righthandle=document.getElementById? document.getElementById('cmotiongallery-righthandle') : document.all['cmotiongallery-righthandle'];
		crossmain.onmousemove=function(e){
			motionengine(e);
		}
		crossmain.onmouseout=function(e){
			stopmotion(e);
			handles('hideall');
		}
	}
	loadedyes=1;
	if (document.body.filters)
		onresize();
}

onresize=function(){
	if (typeof cmotiongallerycontainer!=='undefined'&&cmotiongallerycontainer.filters){
		cmotiongallerycontainer.style.width='0';
		cmotiongallerycontainer.style.width='';
		cmotiongallerycontainer.style.width=Math.min(cmotiongallerycontainer.offsetWidth, maxwidth)+'px';
	}
	if (crossmain) menuwidth=crossmain.offsetWidth;
	if (cross_scroll) cross_scroll.style.left=startpos? (menuwidth-actualwidth)/startpos+'px' : 0;
}

function handles(what){
	if (!iedom) return;
	if (what == 'hideall') {
		lefthandle.style.visibility = 'hidden';
		righthandle.style.visibility = 'hidden';
	} else {
		var cross_scroll_pos = parseInt(cross_scroll.style.left);
		if ((what == 'hidden' && cross_scroll_pos >= 0) || (what == 'visible' && cross_scroll_pos < 0))
			lefthandle.style.visibility = what;
		if ((what == 'hidden' && cross_scroll_pos <= (menuwidth-actualwidth)) || (what == 'visible' && cross_scroll_pos > (menuwidth-actualwidth)))
			righthandle.style.visibility = what;
	}
}

addLoadEvent(fillup);