function displayHide(id) {
	 var state = document.getElementById(id).style.display;  
	 if (state == 'block') {  
		 document.getElementById(id).style.display = 'none';    
	 } else {  
		 document.getElementById(id).style.display = 'block';
	 } 
}

function getSelectedValue(id) {
var sel = document.getElementById(id);
val = sel.options[sel.selectedIndex].value;
return val
}

function alternate(id0,id1,id2) {
//var sel = document.getElementById(id0);
//val = sel.options[sel.selectedIndex].value;
if (getSelectedValue(id0) == 'one') {
document.getElementById(id1).style.display = 'block';
document.getElementById(id2).style.display = 'none';
}
if (getSelectedValue(id0) == 'two') {

document.getElementById(id2).style.display = 'block';
document.getElementById(id1).style.display = 'none';
}
}