function setGdImg(nom,nomImage){
var gdimg = document.images[nom];
	if(gdimg){
		gdimg.src = nomImage;
	}
}
function setContenuZoom(id,obj){
	var allBlock =["zoom","matiere","couleur"];
	for(var i=0;i<allBlock.length;i++){
		var temp= document.getElementById("block"+allBlock[i]);
		var bttemp= document.getElementById("bt"+allBlock[i]);
		removeClass(bttemp,"select");
		if(temp!=null){
			var action = (id==allBlock[i])? "block" : "none";
			temp.style.display = action;
			if(id==allBlock[i]){setClass(document.getElementById("bt"+allBlock[i]),"select")}
		}
	}
}
function removeClass(obj,nom){
	if(obj){
		var newClass = "";
		var allclass= obj.className.toString().split(" ");
		for(var i=0;i<allclass.length;i++){
			if(nom!=allclass[i]){
			newClass +=" "+allclass[i];
			}
		}
		obj.className = newClass;
	}
}
function setClass(obj,nom){
	if(obj){
		obj.className += " "+nom;
	}
}