/* pour la lisibilité des fonction d'économie de caractère :p*/
function getId(id)
{
	return document.getElementById && document.getElementById(id);
}
function getCont(id)
{
	var cont = getId(id);
	var cont_v = cont.innerHTML;
	return cont_v;
}
function setAlpha (elem,alpha){
		if (alpha == 0) {
			elem.style.visibility="hidden";
		} else {
			elem.style.visibility="visible";
		}
		elem.style.opacity = alpha;
}
function setbgRGBMask (elem,RGB){
		if ((RGB[0] >= 250) && (RGB[1] >= 250) && (RGB[2] >= 250)) {
			// alert ('blanc');
			elem.style.backgroundImage = "url(./img/blank.gif)";
			elem.style.backgroundColor ="transparent";
		} else {
			elem.style.backgroundImage = "url(./img/d6/mask_c.png)";
		}
			elem.style.backgroundColor = "rgb("+
				RGB[0]+","+
				RGB[1]+","+
				RGB[2]+")";
}
// function getElementsByClassName(className, tag, elm){
	// var testClass = new RegExp("(^|\\s)" + className + "(\\s|$)");
	// var tag = tag || "*";
	// var elm = elm || document;
	// var elements = (tag == "*" && elm.all)? elm.all : elm.getElementsByTagName(tag);
	// var returnElements = [];
	// var current;
	// var length = elements.length;
	// for(var i=0; i<length; i++){
		// current = elements[i];
		// if(testClass.test(current.className)){
			// returnElements.push(current);
		// }
	// }
	// return returnElements;
// }