/**** Inicio FishEye ***/
var fisheyemenu = {
	evento : '',
	startSize : 68,
	endSize :150,
	initialDivWidth : 0,
	imgType : ".jpg",
	newWidth : 40,
	init : function () {
		var animElements = document.getElementById('fisheye_menu').getElementsByTagName("img");
		var titleElements = document.getElementById('fisheye_menu').getElementsByTagName("span");
		
		for(var j=0; j<titleElements.length; j++) {
			titleElements[j].style.display = 'none';
		}
		
		for(var i=0; i<animElements.length; i++) {
			//var y = animElements[i];
			animElements[i].style.width = fisheyemenu.startSize+'px';
			//fisheyemenu.imgSmall(animElements[i]);
			animElements[i].onmouseover = changeSize;
			animElements[i].onmouseout = restoreSize;
			fisheyemenu.newWidth += parseInt(animElements[i].offsetWidth) + 1;
		}
		var pd = 0;
		if (document.getElementById('fisheye_menu').style.paddingLeft){
			pd = parseInt(document.getElementById('fisheye_menu').style.paddingLeft) * 2;
		}
		fisheyemenu.initialDivWidth = fisheyemenu.newWidth + pd + 40;
		document.getElementById('fisheye_menu').style.width = fisheyemenu.initialDivWidth;
		//document.getElementById('fisheye_menu').style.border = 'solid 1px #000';
		//alert(fisheyemenu.initialDivWidth);
		
		function changeSize() {
			fisheyemenu.evento = 'over';
			//fisheyemenu.imgLarge(this);
			if (!this.currentWidth) this.currentWidth = fisheyemenu.startSize;

			var dif = fisheyemenu.endSize - fisheyemenu.startSize;
			var div = document.getElementById('fisheye_menu');
			div.style.width = parseInt(div.style.width) + dif +'px';
			
			fisheyemenu.resizeAnimation(this,this.currentWidth,fisheyemenu.endSize,15,20,0.333);
		}
		
		function restoreSize() {
			fisheyemenu.evento = 'out';
			if (!this.currentWidth) return;
			fisheyemenu.resizeAnimation(this,this.currentWidth,fisheyemenu.startSize,9,9,0.5);
			//fisheyemenu.imgSmall(this);

		}
	}
	,resizeAnimation : function (elem,startWidth,endWidth,steps,intervals,powr) {
		if (elem.widthChangeMemInt) window.clearInterval(elem.widthChangeMemInt);
		var actStep = 0;
		elem.widthChangeMemInt = window.setInterval (
			function() {
				elem.currentWidth = fisheyemenu.easeInOut(startWidth,endWidth,steps,actStep,powr);
				elem.style.width = elem.currentWidth+"px";
				with (elem.parentNode.getElementsByTagName("span")[0].style){
					//background = '#333'; // set color in css
					width = elem.style.width;
				}
				if (elem.currentWidth < fisheyemenu.endSize){
					elem.parentNode.getElementsByTagName("span")[0].style.display = 'none';
				} else {
					elem.parentNode.getElementsByTagName("span")[0].style.display = 'block';
				}
				//elem.style.height = elem.currentHeight+"px";
				actStep++;
				if (actStep > steps) {
					window.clearInterval(elem.widthChangeMemInt);
				}
				var dif = fisheyemenu.endSize - fisheyemenu.startSize;
				var div = document.getElementById('fisheye_menu');
				if (fisheyemenu.evento == 'out' && parseInt(elem.style.width) == fisheyemenu.startSize){
					div.style.width =  fisheyemenu.initialDivWidth +'px';
				}
			}
			,intervals
		)
	},
	easeInOut : function (minValue,maxValue,totalSteps,actualStep,powr) {
		var delta = maxValue - minValue;
		var stepp = minValue+(Math.pow(((1 / totalSteps)*actualStep),powr)*delta);
		return Math.ceil(stepp)
	},
	imgSmall_old : function (obj) {
		imgSrc = obj.getAttribute("src");
		var typePos = imgSrc.indexOf(fisheyemenu.imgType, 0);
		var imgName = imgSrc.substr(0, typePos);
		obj.setAttribute("src", imgName+"_small"+fisheyemenu.imgType);
	},
	imgLarge_old : function (obj) {
		imgSrc = obj.getAttribute("src");
		var typePos = imgSrc.indexOf("_small", 0);
		var imgName = imgSrc.substr(0, typePos);
		obj.setAttribute("src", imgName+fisheyemenu.imgType);
	},
	imgSmall : function (obj) {
		imgSrc = obj.getAttribute("src");
		var typePos = imgSrc.indexOf(fisheyemenu.imgType, 0);
		var imgName = imgSrc.substr(0, typePos);
		obj.setAttribute("src", imgName+fisheyemenu.imgType);
	},
	imgLarge : function (obj) {
		imgSrc = obj.getAttribute("src");
		var typePos = imgSrc.indexOf(fisheyemenu.imgType, 0);
		var imgName = imgSrc.substr(0, typePos);
		obj.setAttribute("src", imgName+fisheyemenu.imgType);
	}
}

// Add event with wide browser support
if ( typeof window.addEventListener != "undefined" )
    window.addEventListener( "load", fisheyemenu.init, false );
else if ( typeof window.attachEvent != "undefined" )
    window.attachEvent( "onload", fisheyemenu.init);
else {
    if ( window.onload != null ) {
        var oldOnload = window.onload;
        window.onload = function ( e ) {
            oldOnload( e );
            fisheyemenu.init();
        };
    }
    else
        window.onload = fisheyemenu.init;
}