function getLayer(name)
{
   return document.getElementById(name);
}


function moveLayerTo(layer, x, y)
{
   layer.style.left = x + 'px' ;
   layer.style.top  = y + 'px' ;
}

function showLayer(layer) 
{
   layer.style.visibility = "visible";
}


function hideLayer(layer) 
{
   layer.style.visibility = "hidden";
}

function getPageScrollX() 
{
   return document.body.scrollLeft;
}

function getPageScrollY() 
{
   return document.body.scrollTop;
}