var imagesArray = new Array();

 function loadImages (img,src)
 {
	if (document.images)
	{	
		imagesArray[img]=new Image();
		imagesArray[img].src=src;
	}
 }

 function chgImg (name,img)
 {
 if (document.images)
	{	
		document.images[name].src= imagesArray[img].src;
	}
 }
 
function imgRollOver(p_imgId,p_imgSrc)
{
	document.getElementById(p_imgId).src=p_imgSrc;
}

function imgOver(p_imgId,p_imgSrc)
{
	document.getElementById(p_imgId).src=p_imgSrc;
}

function ouvrirfen(page)
{
var hauteur_popup=screen.height*0.8;
var H = (screen.height - hauteur_popup) / 2;
var largeur_popup=screen.width*0.8;
var L = (screen.width - largeur_popup) / 2;
pop_up = window.open(page,"","status=no,scrollbars=yes,resizable=no,height="+hauteur_popup+",width="+largeur_popup+",top="+H+",left="+L);
}
function fenetreCentrer(page,largeur,hauteur,options) {
  var top=(screen.height-hauteur)/2;
  var left=(screen.width-largeur)/2;
  window.open(page,"","top="+top+",left="+left+",width="+largeur+",height="+hauteur+","+options);
}