function showStr( obj ){
//	  if (! loaded) return;
	  if (document.layers){
	  	//alert(showStr.caller)
		eval( 'document.'+ obj +'.visibility = "visible"' );
      }
	  else{
		eval( obj +'.style.visibility = "visible"' );
      }
}

function hideStr( obj ){
//	  if (! loaded) return;
	  if (document.layers){
		eval( 'document.'+ obj +'.visibility = "hidden"' );
      }
	  else{
		eval( obj +'.style.visibility = "hidden"' );
      }
}



function preload(imgObj,imgSrc) {
      if (document.images) {
        eval(imgObj + ' = new Image()');
        eval(imgObj + '.src = "' + imgSrc + '"');
      }
}


function changeImage(layer, imgName, imgObj){
	  if (! loaded) return;
      if (document.layers && layer!=null) eval('document.'+layer+'.document.images["'+imgName+'"].src = '+imgObj+'.src');
      else document.images[imgName].src = eval(imgObj+".src");
   }