isIE = (navigator.appVersion.indexOf("MSIE")!=-1);  
isFireFox = (navigator.userAgent.indexOf("Firefox")!=-1);

menuName = "message";        
menuOffset = 25; 
var cwOffset = 771; 

function showMenu(mName) {
  if (menuName!="") {
    mDiv = document.getElementById("menu"+menuName);
    if (mDiv)
      mDiv.style.display = "none"; 

    mImage = document.getElementById("image"+menuName);
    if (mImage)
      mImage.src = "images/nav/" + menuName + ".gif"
  }
  menuName = mName ;
  
  mDiv = document.getElementById("menu"+menuName);
  if (mDiv) {
    l = (parseInt(document.body.clientWidth) - cwOffset)/2 + menuOffset;
    if (l<0) l = menuOffset;
    mDiv.style.left = l+"px";
    //mDiv.style.display = "block"; 
  }

  mImage = document.getElementById("image"+menuName);
  if (mImage)
    mImage.src = "images/nav/" + menuName + "_o.gif"
}

function Resize() {
  mDiv = document.getElementById("menu"+menuName);
  if (mDiv) {
    l =(parseInt(document.body.clientWidth) - cwOffset)/2 + menuOffset;
    if (l<0) l = menuOffset;
    mDiv.style.left = l+"px";
  }
} 

window.onresize=Resize;