function grandimage(idimage) {
	//blocage de la fonction pendant 750 ms
  if (!$('bloczoom')) {
		//remise taille vignette de toutes les images
		var tabpetitimage = $$("img.petitimage").get("id");
		var nbpetitimage = tabpetitimage.length;
		for (i=0;i<nbpetitimage;i++) {
		  var image = tabpetitimage[i];
		  if (image != idimage) {
		  var coordimagemoins = $(image).getCoordinates();
		  var largimagemoins = coordimagemoins.width;
		  var hautimagemoins = coordimagemoins.height;
		    //alert ("hautimage = "+hautimage+" image = "+image);
		    var hypotenusmoins = largimagemoins/hautimagemoins;
		    var morphimagemoins = new Fx.Morph(image, {duration:750,fps:50});
		    morphimagemoins.start({'width':70*hypotenusmoins,'height':70});
		  }
		}
		var div_bloczoom = new Element("div", {
		"id" : "bloczoom"
		});
		div_bloczoom.inject('site','after');
		setTimeout("debloczoom()",750);
		var coordimageplus = $(idimage).getCoordinates();
		var largimageplus = coordimageplus.width;
		var hautimageplus = coordimageplus.height;
		var hypotenusplus = largimageplus/hautimageplus;
		var morphimageplus = new Fx.Morph(idimage, {duration:750,fps:50});
		morphimageplus.start({'width':210*hypotenusplus,'height':210});
	}
}
function debloczoom() {
  $('bloczoom').destroy();
}