//Hide Layer
function hide(id)
{
var el = document.getElementById(id);
el.style.display = 'none'; 
}

//Show Layer
function reveal(id)
{
var el = document.getElementById(id);
el.style.display = 'block'; 
}


// Simple Toggle Layers
function toggle(id) 
{ 
if (document.getElementById) 
{ 
var el = document.getElementById(id); 
el.style.display = (el.style.display == 'none') ? 'block' : 'none'; 
} 
} 

// Hide or Reveal Layers
function hideOrReveal(id, visibility) 
{ 
	if (document.getElementById) 
	{ 
		var el = document.getElementById(id)
		var el1 = document.getElementById('layer1');
		var el2 = document.getElementById('layer2');
		var el3 = document.getElementById('layer3');
		var el4 = document.getElementById('layer4');
		var el5 = document.getElementById('layer5');
//		var el = document.getElementById(id);
//		var pizza = visibility; 
//alert("hello visibility = "+pizza);
	if (visibility == 'show') {
	el1.style.display = 'none';
	el2.style.display = 'none';
	el3.style.display = 'none';
	el4.style.display = 'none';
	el5.style.display = 'none';
	el.style.display = 'block';
	}
}
}


/* Toggle layer visibility using javascript
function toggleLayer(whichLayer)
{
	if (document.getElementById)
	{
		// this is the way the standards work
		var style2 = document.getElementById(whichLayer).style;
		style2.display = style2.display? "":"block";
	}
	else if (document.all)
	{
		// this is the way old msie versions work
		var style2 = document.all[whichLayer].style;
		style2.display = style2.display? "":"block";
	}
	else if (document.layers)
	{
		// this is the way nn4 works
		var style2 = document.layers[whichLayer].style;
		style2.display = style2.display? "":"block";
	}
}
*/