function setFooter() {
if (document.getElementById) {
 var windowHeight=getWindowHeight();
  if (windowHeight>0) {
   var headerEl=document.getElementById('header').offsetHeight;
   var MyTxtEl=document.getElementById('MyTxt').offsetHeight;
   var leftMenuEl=document.getElementById('leftMenu').offsetHeight;
    if(leftMenuEl>MyTxtEl){
     var contentHeight=leftMenuEl;
	}else{
     var contentHeight=MyTxtEl;
	}
   var footerElement=document.getElementById('bottom');
   var footerHeight=footerElement.offsetHeight;
   footerElement.style.display='block';

    footerElement.style.top=footerHeight+contentHeight+headerEl+'px';
}
}
}