// JavaScript Document

function TB_getPageWidth(){
	var de = document.documentElement;
	var w = window.innerWidth || self.innerWidth || (de&&de.clientWidth) || document.body.clientWidth;
	return w;
}

function TB_getPageHeight(){
	var de = document.documentElement;
	var h = window.innerHeight || self.innerHeight || (de&&de.clientHeight) || document.body.clientHeight;
	return h;
}


function afficher_fond() {
	$(document).ready(function() {
		var posX = (1900 - TB_getPageWidth())/2;
		var posY = (1200 - TB_getPageHeight())/2;
		var larg = TB_getPageWidth();
		var haut = TB_getPageHeight();
  	$("#global").css("background-position","-" + posX + "px -" + posY +"px");
		$("#global").css("width",larg + "px");
		$("#global").css("height",haut + "px");
	});
}