function file(fichier)
{
if(window.XMLHttpRequest) // FIREFOX
xhr_object = new XMLHttpRequest();
else if(window.ActiveXObject) // IE
xhr_object = new ActiveXObject("Microsoft.XMLHTTP");
else
return(false);
xhr_object.open("GET", fichier, false);
xhr_object.send(null);
if(xhr_object.readyState == 4) return(xhr_object.responseText);
else return(false);
}


/***** CUSTOMIZE THESE VARIABLES *****/

  // width to resize large images to
var maxWidth=450;
  // height to resize large images to
var maxHeight=318;
  // valid file types
var fileTypes=["bmp","gif","png","jpg","jpeg"];
  // the id of the preview image tag
var outImage="previewField";
  // what to display when the image is not valid
var defaultPic="_.gif";

/***** DO NOT EDIT BELOW *****/

function preview(what){
  var source=what.value;
  var ext=source.substring(source.lastIndexOf(".")+1,source.length).toLowerCase();
  for (var i=0; i<fileTypes.length; i++) if (fileTypes[i]==ext) break;
  globalPic=new Image();
  if (i<fileTypes.length) globalPic.src=source;
  else {
    globalPic.src=defaultPic;
    alert("Utilisez seulement des images aux formats "+fileTypes.join(", "));
  }
  setTimeout("applyChanges()",200);
}
var globalPic;
function applyChanges(){
  var field=document.getElementById(outImage);
  var x=parseInt(globalPic.width);
  var y=parseInt(globalPic.height);
  if (x>maxWidth) {
    y*=maxWidth/x;
    x=maxWidth;
  }
  if (y>maxHeight) {
    x*=maxHeight/y;
    y=maxHeight;
  }
  field.style.display=(x<1 || y<1)?"none":"";
  field.src=globalPic.src;
  field.width=x;
  field.height=y;
}
// End -->
function redimImage(inImg, inMW, inMH, inAlt)
{
  // Cette function recoit 3 parametres
  // inImg : Chemin relatif de l'image
  // inMW  : Largeur maximale
  // inMH   : Hauteur maximale
  var maxWidth = inMW;
  var maxHeight = inMH;
  // Declarations des variables "Nouvelle Taille"
  var dW = 0;
  var dH = 0;
  // Declaration d'un objet Image
  var oImg = new Image();
  // Affectation du chemin de l'image a l'objet
  oImg.src = inImg;
  // On recupere les tailles reelles
  var h = dH = oImg.height;
  var w = dW = oImg.width;
  // Si la largeur ou la hauteur depasse la taille maximale
  if ((h >= maxHeight) || (w >= maxWidth)) {
    // Si la largeur et la hauteur depasse la taille maximale
    if ((h >= maxHeight) && (w >= maxWidth)) {
      // On cherche la plus grande valeur
      if (h > w) {
        dH = maxHeight;
        // On recalcule la taille proportionnellement
        dW = parseInt((w * dH) / h, 10);
      } else {
        dW = maxWidth;
        // On recalcule la taille proportionnellement
        dH = parseInt((h * dW) / w, 10);
      }
    } else if ((h > maxHeight) && (w < maxWidth)) {
      // Si la hauteur depasse la taille maximale
      dH = maxHeight;
        // On recalcule la taille proportionnellement
      dW = parseInt((w * dH) / h, 10);
    } else if ((h < maxHeight) && (w > maxWidth)) {
      // Si la largeur depasse la taille maximale
      dW = maxWidth;
        // On recalcule la taille proportionnellement
      dH = parseInt((h * dW) / w, 10);
    }
  }
  // On ecrit l'image dans le document
  document.writeln("<img src=\"" + inImg + "\" alt=\"" + inAlt + "\" width=\"" + dW + "\" height=\"" + dH + "\" border=\"0\">");
};

function OpenBrWindow(theURL,winName,features,width,height) { //v3.1
    var window_width = width;
    var window_height = height;
    var window_top = (screen.height-window_height)/2-45;
    var window_left = (screen.width-window_width)/2;
    newWindow=window.open(''+ theURL + '',''+ winName + '','width=' + window_width + ',height=' + window_height + ',top=' + window_top + ',left=' + window_left + ',features=resizable=yes,scrollbars=yes');
    newWindow.focus();
}

function MM_openBrWindow(theURL,winName,features,width,height) { //v3.1
    var window_width = width;
    var window_height = height;
    var newfeatures= features;
    var window_top = (screen.height-window_height)/2-45;
    var window_left = (screen.width-window_width)/2;
    newWindow=window.open(''+ theURL + '',''+ winName + '','width=' + window_width + ',height=' + window_height + ',top=' + window_top + ',left=' + window_left + ',features=' + newfeatures + '');
    newWindow.focus();
}

	var isIE = (navigator.appName == "Microsoft Internet Explorer" 	&& navigator.userAgent.indexOf('Opera') == -1);

	function pngImage(imgSource, w, h) {
 		if(isIE) 
  			document.write('<img src="pixel.gif" height="'+h+'" width="'+w+'"style="filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='+imgSource+' width='+w+' height='+h+');">');
  		else 
  			document.write("<img src="+imgSource+" width="+w+" height="+h+">");
	}
	// Merci Tim