function toggleLayer(whichLayer) 
{
	if (document.getElementById) 
	{
		// this is the way the standards work
		var style2 = document.getElementById(whichLayer).style;
		style2.display = style2.display? "":"none";
	}
	else if (document.all)
	{
		// this is the way old msie versions work
		var style2 = document.all[whichLayer].style;
		style2.display = style2.display? "":"none";
	}
	else if (document.layers)
	{
		// this is the way nn4 works
		var style2 = document.layers[whichLayer].style;
		style2.display = style2.display? "":"none";
	}
}

function getElementsByClassName(oElm, strTagName, strClassName){
var arrElements = (strTagName == "*" && document.all)? document.all : oElm.getElementsByTagName(strTagName);
	    var arrReturnElements = new Array();
	    strClassName = strClassName.replace(/\-/g, "\\-");
	    var oRegExp = new RegExp("(^|\\s)" + strClassName + "(\\s|$)");
	    var oElement;
	    for(var i=0; i<arrElements.length; i++){
	        oElement = arrElements[i];
	        if(oRegExp.test(oElement.className)){
	            arrReturnElements.push(oElement);
	        }
	    }
	    return (arrReturnElements)
	}

updateTitle: function(title) { document.title = title; }

getHTML: function(node) {
  var div = document.createElement('DIV');
  div.appendChild(node.cloneNode(true));
  return div.innerHTML;
}

childOfID: function(element, id, isClass) {
  element = $(element);
  do {
    if (isClass && element.hasClassName(id)) return element; 
    if (!isClass && element.id == id) return element;
  } while (element = $(element.parentNode));
  return false;
}

attachElement: function(p) {
  this.el[p] = $$(this.elements[p]);
  if (this.el[p].length == 1) this.el[p] = this.el[p][0];
},
attachElements: function() {
  this.el = {};
  for (x in this.elements) this.attachElement(x);
},
clearElements: function() {
  for (x in this.el) this.el[x] = null;
}

function change(id, newClass) {
     identity=document.getElementById(id);
     identity.className=newClass;
}

class ActiveRecord::Base
  def dom_id(prefix=nil)
    display_id = new_record? ? "new" : id
    prefix ||= self.class.name.underscore
    prefix != :bare ? "#{prefix.to_s.dasherize}-#{display_id}" : display_id
  end
endSo, you can do stuff like this in your views:

<ul>
<% @entries.each do |entry| %>
  <li id='<%= entry.dom_id %>'>
    <%= entry.body %>
  </li>
<% end %>
</ul>And stuff like this in your controller:

def remove_entry
  entry = JournalEntry.find(params[:id])
  update_page do |page|
    page[entry.dom_id].remove
  end
end

    var newa=document.createElement('a');
    newa.className="class";
    var newimg=document.createElement('img');
    newimg.src="./image.png";
    newimg.alt="Image name";
    newimg.className="Image class";
    newa.appendChild(newimg);
    newa.href="#";