function showMenu(hetMenu) {
  	if(document.getElementById){
		var el= document.getElementById(hetMenu);
		el.style.visibility = "visible";
	}else{
	    if (navigator.appName == 'Netscape') {
    	  document.layers[hetMenu].visibility = "show";
	    } else if (document.all != null) {
    	  document.all[hetMenu].style.visibility = "visible";
	    }
	}
    return;
  }

function hideMenu(hetMenu) {
  if(document.getElementById){
  		var el= document.getElementById(hetMenu);
		el.style.visibility = "hidden";
  }else{
	    if (navigator.appName == 'Netscape') {
	      document.layers[hetMenu].visibility = "hide";
	    } else if (document.all != null) {
	      document.all[hetMenu].style.visibility = "hidden";
	    }
	}
    return;
  }
  
function showimage(imagename)
{
   document.images.pic1.style.visibility = "visible";
   document.images.pic1.src = imagename;
}

function di(id,name){
  if (document.images) {document.images[id].src=eval(name+".src"); }
}

if (document.images) {

leftmenu = 	new Image(17, 13); leftmenu.src = 'graphics/production/left.gif';
leftmenu_on	= new Image(17, 13); leftmenu_on.src = 'graphics/production/left_on.gif';

left = 	new Image(17, 13); left.src = 'graphics/production/left.gif';
left_on	= new Image(17, 13); left_on.src = 'graphics/production/left_on.gif';

right = 	new Image(17, 13); right.src = 'graphics/production/right.gif';
right_on	= new Image(17, 13); right_on.src = 'graphics/production/right_on.gif';

logo = 	new Image(161, 161); logo.src = 'graphics/productions/prod_logo.jpg';
logo_on	= new Image(161, 161); logo_on.src = 'graphics/productions/prod_logo_on.jpg';

}