Javascript cell number validation

Question

Can anyone help me how I can able to validate the cell number using JavaScript? Herewith I have attached my code which is given an error even after I was entering 10 digits for phone number:

if(number.value == "") {

    window.alert("Error: Cell number must not be null.");

    number.focus();

    return false;

}

if(number.length != 10) {

    window.alert("Phone number must be 10 digits.");

    number.focus();

    return false;

}

Any help would be appreciated.

Answer 1

You can use regex for validation which help me a very easy way to do that:

var val = number.value

if (/^\d{10}$/.test(val)) {

    // value is ok, use it

} else {

    alert("Invalid number; must be ten digits")

    number.focus()

    return false

}

I hope this will help.

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