document.getElementsByClassName = function(cl) {
var retnode = [];
var myclass = new RegExp('\\b'+cl+'\\b');
var elem = this.getElementsByTagName('*');
for (var i = 0; i < elem.length; i++) {
var classes = elem[i].className;
if (myclass.test(classes)) retnode.push(elem[i]);
}
return retnode;
}; 


function toggleMe(a){
  var e=document.getElementsByClassName(a);
  for (var i = 0; i < e.length; i++)
  {
  if(e[i].style.display=="none"){
      e[i].style.display="inline";
    } else {
      e[i].style.display="none";
    }
  }
  return true;
}



/*

This should work with any tag that has the class the script is looking for.

example HTML code:

<span class="hide_example1" style="display:none"></span>
<a href="javascript:void(0)" onclick="return toggleMe('hide_example1')"></a>

*/