// Java Document
function DT(id) { 
var el = document.getElementById(id).style; 
if(el.display == "none") { 
el.display = "block"; 
} 
else if(el.display == "block") { 
el.display = "none"; 
} 
} 
function NN(id) {
var el = document.getElementById(id).style;
el.display = "none"
}
function BL(id) {
var el = document.getElementById(id).style;
el.display = "block"
}