String.prototype.startsWith = function(str){
    return (this.indexOf(str) === 0);
}

function mystartswith(dat,inpt){
	var data = dat;
	var input = inpt;
	return (data.startsWith(input));
}

function hideShow(id)
	{
		var o = document.getElementById(id);
		if(o.style.display == '' || o.style.display == 'block') o.style.display = 'none';
		else o.style.display = 'block';
	}

function transformer(obj){
		var texte = obj.innerHTML;
		var baliseImageDown = "<img src=\"images/arrowdown.png";
		var baliseImageRight = "<img src=\"images/arrowright.png";
		var isRightIcon = mystartswith(texte,baliseImageRight);
		var isDownIcon = mystartswith(texte,baliseImageDown);
		if (isRightIcon) {
			texte =	texte.replace('arrowright.png','arrowdown.png');
		}
		else if (isDownIcon) {
			texte =	texte.replace('arrowdown.png','arrowright.png');
		}
		else  {
		}
		obj.innerHTML = texte;

	}