function confirmation(msg,url) {
  if (confirm(msg))
	window.location=url;
  }

function popup(largeur, hauteur) {
  window.open("popup.php","popup","width="+largeur+",height="+hauteur+",toolbar=false,scrollbars=true");
  }

function aide(page) {
  window.open(page,"aide","width=200,height=200,toolbar=false,scrollbars=true");
  }

function image(url) {
  preview = window.open("image.php?url="+url, "preview", "left=50, top=50, toolbar=false, scrollbars=false");
}