function createLayer(name, left, top, width, height, visible, content)
{
	var layer;

	if( ns4 ) 
	{
		document.writeln('<layer name="' + name + '" left=' + left + ' top=' + top + ' width=' + width + ' height=' + height + ' visibility=' + (visible ? '"show"' : '"hide"') + '>');
		document.writeln(content);
		document.writeln('</layer>');
	//layer = getLayer(name);
	// layer.width = width;
	// layer.height = height;
	//}
	} else 
	{
	// if (isNav) {
		document.writeln('<div id="' + name + '" style="position:absolute; overflow:hidden; left:' + left + 'px; top:' + top + 'px; width:' + width + 'px; height:' + height + 'px;' + ' visibility:' + (visible ? 'visible;' : 'hidden;') + '">');
		document.writeln(content);
		document.writeln('</div>');
	}
	//clipLayer(name, 0, 0, width, height);
}
		
function getLayer(name, frameName)
{
	var d;
	if( frameName )
		d = parent.window.frames[frameName].document;
	else
		d = document;

	if( DOM2 )
		return d.getElementById(name);
	if( ns )
		return d.layers[name];
	else if( ie ) 
		return d.all[name];
	else
		return null;
}
		
function isVisible(name) 
{
	var layer = getLayer(name);
	
	if( layer )
	{
		if( ns && layer.visibility == "show" )
			return true;
		if( ie && layer.style.visibility == "visible" )
			return true;
	}
			
	return false;
}

// move layer to x,y
function moveLayer(name, x, y) 
{
	var layer = getLayer(name);
	if( layer )
	{
  		if( ns4 )
    		layer.moveTo(x, y);
  	//if (document.all) {
		else {
    		layer.style.left = x;
   			layer.style.top  = y;
  		}
	}
}

// set layer background color
function setLayerBackgroundColor(name, color) 
{
  	var layer = getLayer(name);		
  	if( layer )
  	{
 		if( ns4 )
    		layer.style.bgColor = color;
  	//else if (document.all)
		else
    		layer.style.backgroundColor = color;
    }
}

// toggle layer to invisible
function hideLayer(name) 
{
 	var layer = getLayer(name);
  	if( layer )
  	{
  		if( ns4 )
    		layer.visibility = "hide";
  		//if (document.all)
		else
			layer.style.visibility = "hidden";
	}
}

// toggle layer to visible
function showLayer(name) 
{
  	var layer = getLayer(name);		
  	if( layer )
  	{
  		if( ns4 )
    		layer.visibility = "show";
  		//if (document.all)
		else
   			layer.style.visibility = "visible";
	}   			
}

// clip layer display to clipleft, cliptip, clipright, clipbottom
function clipLayer(name, clipleft, cliptop, clipright, clipbottom)
{
	var layer = getLayer(name);
	if( layer )
	{
		if( ns4 )
		{
			layer.clip.left   = clipleft;
			layer.clip.top    = cliptop;
			layer.clip.right  = clipright;
			layer.clip.bottom = clipbottom;
		}
		//if (document.all)
		else
			layer.style.clip = 'rect(' + cliptop + ' ' +  clipright + ' ' + clipbottom + ' ' + clipleft + ')';
	}			
}

// replace layer's content with new content
function setLayerContent(name, content, frameName)
{
	var layer = getLayer(name, frameName);
	if( layer )
	{
		if( ns4 && !DOM2 )
		{
			layer.document.open();
			layer.document.writeln(content);
			layer.document.close();
		} 
		else
		{
			layer.innerHTML = content;
		}
	}		
}