function initMenumark() 
	{ 
	var divs = document.getElementsByTagName("div");
	var d;
	for( d =0; d < divs.length; ++d ) 
  		{
	    if( isClass( divs[d], "menumark" ) ) 
    		{
    		var theimgs = divs[d].getElementsByTagName("img");
	   		theimgs[0].style.visibility = "hidden";
    		var thelinks = divs[d].getElementsByTagName("a");
   		
	   		if( document.addEventListener ) 
   				{
	    	    thelinks[0].addEventListener("mouseover",menumarkover, false);      
	        	thelinks[0].addEventListener("mouseout",menumarkout, false);      
			    } 
			    else 
			    {
	        	thelinks[0].attachEvent("onmouseover",menumarkover);      
		        thelinks[0].attachEvent("onmouseout",menumarkout);        
			    }
		    }
    	}
	}

function menumarkover( e ) 
	{
	var obj = e || window.event;
	var target = e.target || e.srcElement;
   	var theimgs = target.parentNode.getElementsByTagName("img");
   	theimgs[0].style.visibility = "visible";
    }
    
function menumarkout( e ) 
	{
	var obj = e || window.event;
	var target = e.target || e.srcElement;
   	var theimgs = target.parentNode.getElementsByTagName("img");
   	theimgs[0].style.visibility = "hidden";
    }