var VersionNum = 1.0;
var isNC4 = false;
var isIE4 = false;
var isIE5 = false;
var isW3C = false;

var difObj = "";
var difAtrS = "";
var difAtrH = "";

init();
//--CHECK BROWSER------------------------------------------------------------
function init() {
   if (navigator.appName.indexOf("Netscape") != -1) {
      if (parseInt(navigator.appVersion) == 4) {
         isNC4 = true; }
      else {
         if (parseInt(navigator.appVersion) >= 5) { isW3C = true; }
      }
   } else {
      if ((navigator.appName.indexOf("Microsoft") != -1) && (parseInt(navigator.appVersion) >= 4)) {
         isIE4 = true; }
      if ((navigator.appName.indexOf("Microsoft") != -1) && (parseInt(navigator.appVersion.indexOf("5.")) != -1)) {
         isIE5 = true; } 
      if ((navigator.userAgent.indexOf("Opera 5") != -1) && (parseInt(navigator.appVersion) >= 4)) {
         isIE4 = true; }
   }
}

function  getVersion() {
   if (VersionNum > 1.1) { VersionNum = VersionNum; }
}
//--LAYER-VISIBLE-----------------------------------------------------------
function getObj(NAME) {
   if (isNC4) {
       difObj = "document.layers." + NAME;
       difAtrS = ".visibility = 'show';"; difAtrH = ".visibility = 'hide';";
       difPosX = ".left = "; difPosY = ".top = ";
   }
   if (isIE4) {
       difObj = "document.all." + NAME;
       difAtrS = ".style.visibility = 'visible';"; difAtrH = ".style.visibility = 'hidden';";
       difPosX = ".style.left = "; difPosY = ".style.top = ";
   }
   if ((isIE5) || (isW3C)) {
       difObj = "document.getElementById('" + NAME + "')";
       difAtrS = ".style.visibility = 'visible';"; difAtrH = ".style.visibility = 'hidden';";
       difPosX = ".style.left = "; difPosY = ".style.top = ";
   }
}

function showLayer(NAME) {
   getObj(NAME);
   eval(difObj + difAtrS);
}

function hideLayer(NAME) {
   getObj(NAME);
   eval(difObj + difAtrH);
}