/*
Layer Functions
*/
function showHideLayer(layer, action)
{
	//prevLayer = layer;
	
	layerObj = document.getElementById(layer);		
	 
	if(action =="show")
		{v="visible";}
	else
	{	
		
		if(prevLayer != "")
		{
			prevLayer = "";
		}
		
		v="hidden";
	}	
						
	layerObj.style.visibility = v;	
		
}

function getLayervisibility(layer)
{
	layerObj = document.getElementById(layer);
	v = layerObj.style.visibility;
	return v;
}

function showHideLayers(layer, action)
{
	if(prevLayer != layer)
 	{		
			if(prevLayer != "")
			{
				currentLayerObj = document.getElementById(prevLayer);
				currentLayerObj.style.visibility = "hidden";		
				//alert("hide"+currentLayer+"|"+layer);
			}
					
			prevLayer = layer;
			layerObj = document.getElementById(layer);		
			
			if(action =="show")
				{v="visible";}
			else
				{v="hidden"}
						
			layerObj.style.visibility = v;				
	}
}



/*
function showHideLayer(layer)
{
	
	layerObj = document.getElementById(layer);		
	 
	if(getLayervisibility(layer) == "none")
		{
			d="block";
		}
	else
		{			
			d="none";
		}						
	
	layerObj.style.display = d;				
}
*/


function setLayerPosition(layer, curX, curY)
{
	layerObj = document.getElementById(layer);
	layerObj.style.top = curY+'px';
	layerObj.style.left = curX+'px';	
}