document.getElementsByClassName = function(){ 
  if(arguments.length == 1) 
    arguments[1]='*'; 
  var retnode = []; 
  var myclass = new RegExp('\\b'+arguments[0]+'\\b'); 
  var elem = this.getElementsByTagName(arguments[1]); 
  for(var i = 0; i < elem.length; i++){ 
    var classes = elem[i].className; 
    if(myclass.test(classes)) 
      retnode.push(elem[i]); 
  }; 
  return retnode; 
}; 
window.onload=function(){ 
  var x = document.getElementsByClassName('HoverMe', 'a'); 
  for(var i = 0; i < x.length; i++){ 
    x[i].onmouseover=function(){ 
      var m = document.getElementsByClassName('HoverMe', 'a'); 
      var n = document.getElementsByClassName('showMe', 'div'); 
      for(var i = 0; i<m.length; i++){ 
        n[i].style.display = (m[i]==this)?'block':'none'; 
      }; 
    }; 
	x[i].onmouseout=function(){ 
      var m = document.getElementsByClassName('HoverMe', 'a'); 
      var n = document.getElementsByClassName('showMe', 'div'); 
      for(var i = 0; i<m.length; i++){ 
        n[i].style.display = 'none'; 
      };
    };
  }; 
  x = document.getElementsByClassName('showMe','div'); 
  for(var i = 0; i < x.length; i++){ 
    x[i].style.display = 'none'; 
  }; 
};