JavaScript some usage summary _javascript skill

The following usage needs to be added to the JSP in the attribute onclick. For example, onclick= "Javascript:allselect ()"//javascript can omit
or use the function Allselect () with document.getElementById ("Allselectbox"). onclick = function ();
Select All
Fuction Allselect () {
var form = document.forms[0];
var state = form.allselectbox.checked;
var length = Form.username.length;
if (length) {
for (Var i=0;i<length;i++) {
Form.usernames[i].checked=state;
}
}else Form.username.check = State;
}
Another way to do it all:
function Allselect () {
var items = document.getelementsbyname ("usernames");
var state = Document.getelementsbyname ("Allselectbox") [0].checked;
if (items.length) {
for (var i = 0; i < items.length; i++) {
items[i].checked = State;
}
}else{
items.checked = State;
}
}
Single selection:
Fuction SelectItem () {
var form = document.forms[0];
var length = Form.username.length;
if (length) {
for (Var i=0;i<length;i++) {
if (form.usernames[i].checked) return true;
}
}else return form.usernames.check;
}
Go to another page:
function ToPage (page) {
var form = Document.forms[0]
Form.page.value = page;
Form.submit;
}
To radio the value of a radio box:
function Getradiovalue (objradio) {
var result = "";
try{
if (typeof (objradio.value) = = "undefined") {
for (Var i=0;i<objradio.length;i++) {
if (objradio[i].checked) {
return objradio[i].value;
}
}
}else{
if (objradio.checked) result = Objradio.value;
}
}catch (e) {result = "";}
return result;
}
Email Verification:
function IsValidEmail (inemail) {
var filter =/^ ([a-za-z0-9_\.\-]) +\@ ([a-za-z0-9\-]) +\.) + ([a-za-z0-9]{2,4}) +$/;
Return Filter.test (Inemail);
}
Check phone format:
function Validatemobile () {
var form = document.forms[0];
if (form.mobile.value!= "") {
var num =/^1[35]\d{9}$/
if (!num.test (Form.mobile.value)) {
Alert ("The consignee's cell phone number is not in the correct format");
return false;
}
Alert ("correct");
}
}
Cond........