function Loader(element){ this.element = element; };

Loader.prototype = {
	instance: null,        // instance Singleton
	element: this.element, // contiendra l'élément loader
	value: 0,              // contiendra le pourcentage de chargement

	update: function(){  this.value = (this.value>=100)?100:this.value; this.element.style.width = this.value+'%'; },

	start: function(){   this.value = 0;                     this.update(); },
	inc:   function(v){  this.value += (v)?v:10;             this.update(); },
	stop:  function(){   this.value = 100;                   this.update(); },

	getInstance: function(element){
		if( Loader.prototype.instance == null ) Loader.prototype.instance = new Loader(element);

		return Loader.prototype.instance;
	}

};