// IXF1.0 :: Image cross-fade 
// *****************************************************
// DOM scripting by brothercake -- http://www.brothercake.com/
//******************************************************
//global object
var ixw = { 'clock' : null, 'count' : 1 }
/*******************************************************



/*****************************************************************************
 List the images that need to be cached
*****************************************************************************/

ixw.imgs = [
	'images/2.png'
	];

/*****************************************************************************
*****************************************************************************/



//cache the images
function cachecross()
{
ixw.imgsLen = ixw.imgs.length;
ixw.cache = [];
for(var i=0; i<ixw.imgsLen; i++)
{
	ixw.cache[i] = new Image;
	ixw.cache[i].src = ixw.imgs[i];
}
}

//cache the images
function cachecross(percorso) {

    ixw.cache = [];
    ixw.cache[0] = new Image;
    ixw.cache[0].src = percorso;

    ixw.cache[0].onload = function() 
	{
		
    crosswipe(document.getElementById('immaginehome'), percorso, '4', 'che', 'null');
	
	
	
	 alert('ok');
    };
	
	
}

var onload = function() {
    alert('caricata');
}

function crosswipe() {
    //if the timer is not already going
    if (ixw.clock == null) {
        //copy the image object 
        ixw.obj = arguments[0];

        //get its dimensions
        ixw.size = { 'w': ixw.obj.width, 'h': ixw.obj.height };

        //copy the image src argument 
        ixw.src = arguments[1];

        //change the image alt text if defined
        if (typeof arguments[4] != 'undefined' && arguments[4] != '') {
            ixw.obj.alt = arguments[4];
        }

        //if dynamic element creation is supported
        if (typeof document.createElementNS != 'undefined' || typeof document.createElement != 'undefined') {
            //create a new image object and append it to body
            //detecting support for namespaced element creation, in case we're in the XML DOM
            ixw.newimg = document.getElementsByTagName('body')[0].appendChild((typeof document.createElementNS != 'undefined') ? document.createElementNS('http://www.w3.org/1999/xhtml', 'img') : document.createElement('img'));

            //set positioning classname
            ixw.newimg.className = 'idupe';

            //set src to new image src
            ixw.newimg.src = ixw.src

            //move it to superimpose original image
            ixw.newimg.style.left = ixw.getRealPosition(ixw.obj, 'x') + 'px';
            ixw.newimg.style.top = ixw.getRealPosition(ixw.obj, 'y') + 'px';

            //set it to be completely hidden with clip
            ixw.newimg.style.clip = 'rect(0, 0, 0, 0)';

            //show the image 
            ixw.newimg.style.visibility = 'visible';

            //copy and convert fade duration argument 
            ixw.length = parseInt(arguments[2], 10) * 1000;

            //create fade resolution argument as 20 steps per transition
            ixw.resolution = parseInt(arguments[2], 10) * 20;

            //copy slide direction argument
            ixw.dir = arguments[3];

            //start the timer
            ixw.clock = setInterval('ixw.crosswipe()', ixw.length / ixw.resolution);
        }

        //otherwise if dynamic element creation is not supported
        else {
            //just do the image swap

            ixw.obj.src = ixw.src;
        }

    }
};


//crosswipe timer function
ixw.crosswipe = function() {
    //decrease the counter on a linear scale
    ixw.count -= (1 / ixw.resolution);

    //if the counter has reached the bottom
    if (ixw.count < (1 / ixw.resolution)) {
        //clear the timer
        clearInterval(ixw.clock);
        ixw.clock = null;

        //reset the counter
        ixw.count = 1;

        //set the original image to the src of the new image
        var browser = navigator.appName;
        var b_version = navigator.appVersion;
        var version = parseFloat(b_version);


        if (browser == "Microsoft Internet Explorer" && version <= 6) {



            ixw.obj.style.visibility = "hidden";

            ixw.obj.src = ixw.src;

            ixw.obj.style.visibility = "normal";
        }
        else {


        
            ixw.obj.src = ixw.src;


        }

    }

    //animate the clip of the new image
    //using the width and height properties we saved earlier
    ixw.newimg.style.clip = 'rect('
		+ ((/bt|bltr|brtl/.test(ixw.dir)) ? (ixw.size.h * ixw.count) : (/che|cc/.test(ixw.dir)) ? ((ixw.size.h * ixw.count) / 2) : (0))
		+ 'px, '
		+ ((/lr|tlbr|bltr/.test(ixw.dir)) ? (ixw.size.w - (ixw.size.w * ixw.count)) : (/cve|cc/.test(ixw.dir)) ? (ixw.size.w - ((ixw.size.w * ixw.count) / 2)) : (ixw.size.w))
		+ 'px, '
		+ ((/tb|tlbr|trbl/.test(ixw.dir)) ? (ixw.size.h - (ixw.size.h * ixw.count)) : (/che|cc/.test(ixw.dir)) ? (ixw.size.h - ((ixw.size.h * ixw.count) / 2)) : (ixw.size.h))
		+ 'px, '
		+ ((/lr|tlbr|bltr/.test(ixw.dir)) ? (0) : (/tb|bt|che/.test(ixw.dir)) ? (0) : (/cve|cc/.test(ixw.dir)) ? ((ixw.size.w * ixw.count) / 2) : (ixw.size.w * ixw.count))
		+ 'px)';

    //keep new image in position with original image
    //in case text size changes mid transition or something
    ixw.newimg.style.left = ixw.getRealPosition(ixw.obj, 'x') + 'px';
    ixw.newimg.style.top = ixw.getRealPosition(ixw.obj, 'y') + 'px';

    //if the counter is at the top, which is just after the timer has finished
    if (ixw.count == 1) {
        //remove the duplicate image
        ixw.newimg.parentNode.removeChild(ixw.newimg);
    }
};




//get real position method
ixw.getRealPosition = function()
{
	this.pos = (arguments[1] == 'x') ? arguments[0].offsetLeft : arguments[0].offsetTop;
	this.tmp = arguments[0].offsetParent;
	while(this.tmp != null)
	{
		this.pos += (arguments[1] == 'x') ? this.tmp.offsetLeft : this.tmp.offsetTop;
		this.tmp = this.tmp.offsetParent;
	}
	
	return this.pos;
};