var browsername = navigator.appName;

function footer(divid, divwidth, offset) {
  if (browsername == "Microsoft Internet Explorer") 
      iefooter(divid, divwidth, offset);
  else if (browsername == "Netscape") 
    nsfooter(divid, divwidth, offset);
  else
    defaultfooter(divid, divwidth, offset); 
}

function iefooter(divid, divwidth, offset) {
  document.getElementById(divid).style.top = document.body.clientHeight - offset + document.body.scrollTop;

  var divleftposition = (document.body.clientWidth - divwidth) / 2;

  if(divleftposition < 0){
    divleftposition = 1;
  }  

  document.getElementById(divid).style.left = divleftposition;


  setTimeout("iefooter('" + divid + "', '" + divwidth + "', '"+ offset + "')",10);
}

function nsfooter(divid, divwidth, offset) {  
  document.getElementById(divid).style.top = window.innerHeight - offset + document.body.scrollTop;
  
  var divleftposition = (window.innerWidth - divwidth) / 2;
  
  if(divleftposition < 0){
    divleftposition = 0 + 9;
  } 

  document.getElementById(divid).style.left = divleftposition - 8;
  
  setTimeout("nsfooter('" + divid + "', '" + divwidth + "', '"+ offset + "')",10);
}

function defaultfooter(divid, divwidth, offset) {

}