javascript validations for email,phone/mobile

Introduction :

Javascript and jquery validation are client side so it can decrease the server load unless using the client side validation it is faster than the server validation like asp.net, in this tutorial explain client validation like mobile validation,Email validation,pasword with regular expresion,and required field validator etc.

var stUserName = document.getElementById("txtUserName").value;
var stPassword = document.getElementById("txtstPassword").value;
var stEmailId = document.getElementById("txtEmailId").value;
var stContactNo = document.getElementById("txtContactNo").value;
var confirmPassword = $("#txtConformPwd").val();

var ContactNo = /^$?([0-9]{3})$?[-. ]?([0-9]{3})[-. ]?([0-9]{4})$/;
var name = /^[A-Za-z0-9 ]{3,20}$/;
var emailReg = /^([a-zA-Z0-9_\.\-\+])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;

if (stUserName == "") {
ShowError("Please Provide UserName");
return false;
}
else if (!stUserName.match(name)) {
ShowError("White space is not allowed.");
return false;
}

if (stPassword == "") {
ShowError("Please Provide Password");
return false;
}
if (stPassword != confirmPassword) {
ShowError("Confirm Password do not match.");
return false;
}
if (!(stEmailId).match(emailReg)) {
ShowError("Invalid Email...!!!!!!");
return false;
}

if (stContactNo == "") {
ShowError("Please Provide ContactNo");
return false;
}
else if (!(stContactNo).match(ContactNo)) {
ShowError("Not a valid Phone Number");
return false;

}

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* Gridview find control in asp.net

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javascript validations for email,phone/mobile

javascript validations for email,phone/mobile