// Gestion du docks des marques
$(document).ready(function(){
	$('#dock2').Fisheye(
		{
			maxWidth: 60,
			items: 'a',
			itemsText: 'h2',
			container: '.dock-container2',
			itemWidth: 80,
			proximity: 100,
			alignment : 'left',
			valign: 'bottom',
			halign : 'center'
		}
	)
});

// Convertire des images en noir et blanc avec Canvas
$(document).ready(function(){
	// On rend les photos en NVG	
	$('.row_even').find('img').each(function() {
		 var imgObj = $(this);
		 if($.browser.msie){
		        grayscaleImageIE(imgObj);
		 } else {
		        this.src = grayscaleImage(this);
		 }           
     });
});
	
// Fonctions Canvas pour IE et autres
function grayscaleImageIE(imgObj)
{
    imgObj.style.filter = 'progid:DXImageTransform.Microsoft.BasicImage(grayScale=1)';
}

function grayscaleImage(imgObj)
{
    var canvas = document.createElement('canvas');
    var canvasContext = canvas.getContext('2d');
    
    var imgW = imgObj.width;
    var imgH = imgObj.height;
    canvas.width = imgW;
    canvas.height = imgH;
    
    canvasContext.drawImage(imgObj, 0, 0);
    var imgPixels = canvasContext.getImageData(0, 0, imgW, imgH);
    
    for(var y = 0; y < imgPixels.height; y++){
        for(var x = 0; x < imgPixels.width; x++){
            var i = (y * 4) * imgPixels.width + x * 4;
            var avg = (imgPixels.data[i] + imgPixels.data[i + 1] + imgPixels.data[i + 2]) / 3;
            imgPixels.data[i] = avg; 
            imgPixels.data[i + 1] = avg; 
            imgPixels.data[i + 2] = avg;
        }
    }
    
    canvasContext.putImageData(imgPixels, 0, 0, 0, 0, imgPixels.width, imgPixels.height);
    return canvas.toDataURL();
}