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I want to validate a mobile no through client side. I have validated it as mobile no should start with country code and it should start with 9,8 or 7. Now i want to validate it so that it should not less than 12 digit including country code. how can i achieve this? can any one suggest me some sample code?
my code looks like this:
var txtPhone = document.getElementById(phoneID); //validating user phone no
     if (txtPhone.value != "") {
         var y = txtPhone.value;
         if (isNaN(y) || y.indexOf(" ") != -1) {
             alert("Invalid Mobile No.");
//             return false;
         if (y.length > 12 || y.length < 12) {
             alert("Mobile No. should be entered with country code");
            // return false;
         if (!(y.charAt(0) == "9" || y.charAt(0) == "8" || y.charAt(0) == "7")) {
             alert("Mobile No. should start with 9,8 or 7 ");
            // return false;
Posted 19-Feb-13 1:03am
Updated 19-Feb-13 1:06am
Karthik Harve 19-Feb-13 7:06am
[Edit] added pre tags.
Karthik Harve 19-Feb-13 7:08am
What is the error or problem ?
Ankur\m/ 19-Feb-13 7:35am
What's wrong with the code you wrote?
ryanb31 19-Feb-13 7:52am
Doesn't your code work? The alternative is to use regular expressions.

1 solution

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Solution 1

1. Take an advantage of HTML5 validation
<input type="tel" name="phone" required=""></input>[^]

2. Use the fallback where not supported[^] or similar

3. Always to server side validation in addition. It is not quite clear what language you use, but any server side language has some validation libraries.

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