function swap(id)
{
	var x = document.getElementsByTagName("span");
	
	for (i=0;i<x.length;i++)
	{x[i].style.display = 'none';}
	
	document.getElementById(id).style.display = 'block';
}
function toggle(id)
{
    var object=document.getElementById(id);
    if(object)
	{
     	if(object.style.display=='block')
        object.style.display='none';
		else
        object.style.display='block';
	}
}