var BasicInteractions = new function() {
    
    
    this.toggleHtmlClassOnClick = function (objId, htmlId, onClass, offClass)
	{
	    var o = document.getElementById(objId);
	    var h = document.getElementById(htmlId);
	    o.onclick = function(event){
			if (h.getAttribute("class") == onClass)
				h.setAttribute("class", offClass);
			else 
				h.setAttribute("class", onClass);
			}
	    
	}
	
    this.toggleHtmlOnClick = function (objId, htmlId)
    {
	this.toggleHtmlClassOnClick(objId, htmlId, "revealedToToggle", "hiddenToToggle")
    }
}