/*
IF90 Horizontal Wheel Scrolling

Adapted from:
http://adomas.org/javascript-mouse-wheel/
*/

function rewind() {
	if (window.opera){
		window.scrollTo(0,0);
	} else {
		document.body.scrollLeft = 0;
		document.documentElement.scrollLeft = 0;
	}
}

function handle(delta) {
	if (window.opera){
		if (delta < 0){
			window.scrollBy(scroll, 0);
		}else{
			window.scrollBy(-scroll, 0);
		}
	} else {
		diff = document.body.scrollLeft;
		if (delta < 0){
			document.body.scrollLeft += scroll;
			if (diff == document.body.scrollLeft)
			{
				document.documentElement.scrollLeft += scroll;
			}
		}else{
			document.body.scrollLeft -= scroll;
			if (diff == document.body.scrollLeft)
			{
				document.documentElement.scrollLeft -= scroll;
			}
		}
	}
}

function wheel(event){
	var delta = 0;
	if (!event) {
		event = window.event;
	}
	if (event.wheelDelta) {
		delta = event.wheelDelta/120;
	} else if (event.detail) {
		delta = -event.detail/3;
	}
	if (delta) {
		handle(delta);
	}
	if (event.preventDefault) {
    event.preventDefault();
	}
  event.returnValue = false;	
}

/* Initialization code. */
if (window.addEventListener){
	window.addEventListener('DOMMouseScroll', wheel, false);
}
window.onmousewheel = document.onmousewheel = wheel;
var scroll = 140;