function showLayer(lyr) {
    if (isSelected == false)
    {
        document.getElementById(currentLayer).className = 'hide';
        document.getElementById(lyr).className = 'show';
        currentLayer = lyr;
    }
}

function showLayer2(lyr, lyr2) {
    if (isSelected == false)
    {
        document.getElementById(currentLayer).className = 'hide';
        document.getElementById(currentLayerCaseHistory).className = 'hide';
        document.getElementById(lyr).className = 'show';
        document.getElementById(lyr2).className = 'show';
        currentLayer = lyr;
        currentLayerCaseHistory = lyr2;
    }
}

function showAndHideLayer2(index, indexa) {
    
	if (index == currentLayerHide) {
		document.getElementById(indexa).className = 'hide';
		document.getElementById(index).className = 'show';
		currentLayer = '';
		currentLayerHide = '';
		return;
		
	}
	
	if (currentLayer != '' && currentLayerHide != '' )
	{
		document.getElementById(currentLayerHide).className = 'show';
		document.getElementById(currentLayer).className = 'hide';
	}
		
	document.getElementById(indexa).className = 'hide';
	document.getElementById(index).className = 'show';
	currentLayer = index;
	currentLayerHide = indexa;
	
	
}

function showAndHideLayer(lyr) 
{   
   if (currentLayer != lyr)
   {    
        document.getElementById(currentLayer).className = 'hide'
   }
   
   if (document.getElementById(lyr).className == 'hide')
        document.getElementById(lyr).className = 'show';
    else
        document.getElementById(lyr).className = 'hide';
   
   currentLayer = lyr;
}

function showTab(lyr) {
    
    if (isSelected == false)
    {
        document.getElementById(currentTab).className = 'taboff';
        document.getElementById(lyr).className = 'tabon';
        currentTab = lyr;
    }
}

function blockTab(lyr, layer) 
{
    isSelected = !isSelected;
        
	if (isSelected == true)
	{
		document.getElementById(currentTab).className = 'tabon';
		document.getElementById(lyr).className = 'tabclick';
    }
    else
    {   
		document.getElementById(currentTab).className = 'taboff';
		document.getElementById(lyr).className = 'tabon';
    }

    currentTab = lyr;
    
    document.getElementById(currentLayer).className = 'hide';
    document.getElementById(layer).className = 'show';
    currentLayer = layer;
}

function blockTab2(lyr, layer, layer2) 
{
    blockTab(lyr, layer);
    
    document.getElementById(currentLayerCaseHistory).className = 'hide';
    document.getElementById(layer2).className = 'show';
    currentLayerCaseHistory = layer2;
}