// getElementByClass function from http://www.webmasterworld.com/forum91/1729.htm
//Create an array
  var allPageTags = new Array();

  function doSomethingWithClasses(theClass) {
//Populate the array with all the page tags
    var allPageTags=document.getElementsByTagName("*");
//Cycle through the tags using a for loop
    for (var i=0; i<allPageTags.length; i++) {
//Pick out the tags with our class name
      if (allPageTags[i].className==theClass) {
//Manipulate this in whatever way you want
        allPageTags[i].style.display='none';
      }
    }
  }

function show(ids) {
  doSomethingWithClasses('workshop-options');

  var obj = document.getElementById(ids);
  if (obj.style.display != 'block') { obj.style.display = 'block'; }
                               else { obj.style.display = 'none'; }
}

function hide(ids) {
  doSomethingWithClasses('workshop-options');

  var obj = document.getElementById(ids);
  if (obj.style.display != 'block') { obj.style.display = 'none'; }
                               else { obj.style.display = 'block'; }
}