JSP radio button verification, drop-down box validation, check box verification to implement code _JSP programming

Verify Sex (radio button validation)
function Checkxb () {
var temp = false;
var xbobj1= document.getelementbyid ("Xb1");
var xbobj2= document.getelementbyid ("Xb2");
if (xbobj1.checked | | xbobj2.checked) {
temp = true;
}
return temp;
}
function Checkform () {
Verify Sex (radio button validation)
if (!CHECKXB ()) {
Alert ("Please select Gender");
return false;
}
Certification staff category (dropdown box validation)
if (document.getElementById ("lb"). SelectedIndex = = 0) {
Alert ("Please select person category");
return false;
}
}
(check box validation) to determine whether at least one checkbox is selected.
function Checkselectedone (cbxname) {
var Cbxs = Document.getelementsbyname (cbxname);
if (Cbxs!= null) {
if (cbxs.length) {
for (var i=0; i<cbxs.length; i++) {
if (cbxs[i].checked) {
return true;
}
}
}else{
Return cbxs.checked
}
}
return false;
}
if (!checkselectedone (' Xgjzh ')) {
Alert ("You have no choice!") ");
}