// JavaScript Document
function view_ans(num) { 
if(document.getElementById("ans" + num).style.display == "none") { 
document.getElementById("ans" + num).style.display = "block"; 
} else if(document.getElementById("ans" + num).style.display == "block") { 
document.getElementById("ans" + num).style.display = "none"; 
} 
} 


function close_ans(num) {
if(document.getElementById("ans" + num).style.display == "block")
{
document.getElementById("ans" + num).style.display = "none";
}
}