function Popup(){

	this.element = {
		frame:  document.querySelector('#POPUP'),
		header: document.querySelector('#POPUP .header'),
		body:   document.querySelector('#POPUP .body'),
		footer: document.querySelector('#POPUP .footer')
	};

}

Popup.prototype = {

	element: { frame: null, header: null, body: null, footer: null },

	show: function(){
		this.element.frame.addClass('active');
		return this;
	},

	hide: function(){
		this.element.frame.remClass('active');
		return this;
	},

	ask: function(pObject, pHandler){
		/* (1) Check argument
		---------------------------------------------------------*/
		/* (1) Check type */
		if( !(pObject instanceof Object) )
			return null;

		/* (2) Check Title */
		if( pObject.title == null )
			return null;

		/* (3) Check Content */
		if( pObject.content == null )
			return null;

		/* (4) Check Type */
		if( pObject.type == null )
			return null;

		/* (5) Check Action */
		if( pObject.action == null )
			return null;

		/* (6) Check handler */
		if( !(pHandler instanceof Function) )
			return null;


		/* (2) Set the content
		---------------------------------------------------------*/
		/* (1) Title */
		this.element.header.innerHTML = pObject.title;

		/* (2) Content */
		this.element.body.innerHTML = pObject.content;


		/* (3) Set the buttons (action)
		---------------------------------------------------------*/
		/* (1) Define action button */
		var action_btn = document.createElement('button');
			action_btn.className = pObject.type;
			action_btn.innerHTML = pObject.action;

		/* (2) Define cancel button */
		var cancel_btn = document.createElement('button');
			cancel_btn.className = 'grey';
			cancel_btn.innerHTML = 'Annuler';

		/* (3) Bind events */
		function handler(e){ this.hide(); pHandler( e.target.className != 'grey' ); }

		action_btn.addEventListener('click', handler.bind(this), false);
		cancel_btn.addEventListener('click', handler.bind(this), false);

		/* (4) Add elements to the object */
		this.element.footer.innerHTML = '';
		this.element.footer.appendChild(action_btn);
		this.element.footer.appendChild(cancel_btn);

		return this.show();
	}

};