var ECI = {
	itemSelect: {
		prefix: "item_select_group_",
		total_groups: 0,
		left_arrow: "left_arrow_img",
		right_arrow: "right_arrow_img",
		current_group: 1,
		init: function (total, prefix, current) {
			this.total_groups = total;
			if (prefix) { this.prefix = prefix; }
			if (current) { this.current = current; }
			MM_preloadImages(ECI.images.deactivateSrc(this.left_arrow),ECI.images.hoverSrc(this.left_arrow),ECI.images.deactivateSrc(this.right_arrow),ECI.images.hoverSrc(this.right_arrow));
		},
		prev: function () {
			if (this.hasPrev()) {
				this.getGroup(this.current_group).hide();
				this.current_group--;
				this.getGroup(this.current_group).show();
				this.swapArrows();
			}
		},
		next: function () {
			if (this.hasNext()) {
				this.getGroup(this.current_group).hide();
				this.current_group++;
				this.getGroup(this.current_group).show();
				this.swapArrows();
			}
		},
		hasPrev: function () {
			return !((this.current_group - 1) < 1);
		},
		hasNext: function () {
			return !((this.current_group + 1) > this.total_groups);
		},
		getGroup: function(group_num) {
			return $(this.prefix + group_num);
		},
		swapArrows: function() {
			if (this.hasNext()) {
				ECI.images.activate(this.right_arrow);
			} else {
				ECI.images.deactivate(this.right_arrow);
			}
			if (this.hasPrev()) {
				ECI.images.activate(this.left_arrow);
			} else {
				ECI.images.deactivate(this.left_arrow);
			}
		}
	},
	scrollTo: function(el) {
		new Effect.ScrollTo(el, {duration: 0.5, fps: 30});
	},
	images: {
		swap: function(for_el,to) {
			$(for_el).src = to;
		},
		activate: function (for_el) {
			return this.swap(for_el,this.activateSrc(for_el));
		},
		deactivate: function (for_el) {
			return this.swap(for_el,this.deactivateSrc(for_el));		
		},
		hover: function (for_el) {
			return this.swap(for_el,this.hoverSrc(for_el));
		},
		replaceSrc: function (for_el,search,replace_with) {
			return $(for_el).src.replace(search,replace_with);
		},
		activateSrc: function (for_el) {
			return this.replaceSrc(for_el,/_off/,'_on');
		},
		deactivateSrc: function (for_el) {
			return this.replaceSrc(for_el,/_on/,'_off');
		},
		hoverSrc: function (for_el) {
			return this.replaceSrc(for_el,/_off/,'_on');
		},
		restore: function (for_el) {
			MM_swapImgRestore();
		}
	},
	popup: function (link,title,width,height) {
		return window.open(link,title,"height="+height+",width="+width+",status=no,toolbar=no,menubar=no,location=no");
	}
};

Element.addMethods({
	toggleClass: function(elem,css) { 
		if (Element.hasClassName(elem,css)) {
			Element.removeClassName(elem,css);
		} else {
			Element.addClassName(elem,css);
		}
	}
});

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}