///Browser detection
var isIE = document.all;
var isIE6 = isIE && document.implementation;
var isIE5 = isIE && window.print && !isIE6;
var isIEDOM2 = isIE5 || isIE6;
var isIE4 = isIE && !isIEDOM2 && navigator.cookieEnabled;
var isIE3 = isIE && !isIE4 && !isIEDOM2;
var isNS = navigator.mimeTypes && !isIE;
var isNS3 = isNS && !navigator.language;
var isNS4 = document.layers;
var isNS6 = document.getElementById && !isIE;
var isNS7 = isNS6;
var isNS71 = document.designMode;
var isNSDOM2 = isNS6;
var isDOM2 = isIEDOM2 || isNSDOM2;
var isMacIE = document.all && !window.print;
var isWin = navigator.userAgent.indexOf("Win") > -1;
var isMac = navigator.userAgent.indexOf("Mac") > -1;
var isOpera = (navigator.userAgent.toLowerCase().indexOf('opera') > -1); 

// Fonction d'alias sur objet du formulaire
function PLg(obj){objet = document.getElementById(obj); return objet}