function hide(id){
	var block; 
	if (document.getElementById) { 
		block = document.getElementById(id).style; 
	} else  if (document.layers) { 
		block = document.layers[id]; 
	} else if (document.all) { 
		block = document.all[id].style; 
	} 
	if (block){
		block.visibility = 'hidden'; 
		block.display = 'none'; 

	/*	block.position = 'absolute'; */
	}
}

function show(id){
	var block; 
	if (document.getElementById) { 
		block = document.getElementById(id).style; 
	} else  if (document.layers) { 
		block = document.layers[id]; 
	} else if (document.all) { 
		block = document.all[id].style; 
	} 
	if (block){
		block.visibility = 'visible'; 
		block.display = 'block'; 

		/*block.position = 'relative'; */
	}
}

function showhide(id){
	var block; 
	if (document.getElementById) { 
		block = document.getElementById(id).style; 
	} else  if (document.layers) { 
		block = document.layers[id]; 
	} else if (document.all) { 
		block = document.all[id].style; 
	} 
	if (block){ 
		/*alert (document.getElementById(id).style.visibility);*/
		if (block.visibility == 'visible') { hide(id); }
		else { show(id); }
	}
}