Skip to main content

How to validate email address in javascript

Recently i have posted how to validate mobile number by javascript, how to validate mobile  number, email address through jquery and now this article will show you how to validate email address using simple javascript or using regular expression in javascript.

here is the code for that just copy and paste the code given below and pass the parameter that is id of email text box this code validate blank field also.

Simple JavaScript Mobile Validation:

function validate_email(tbEMId) {
            var tbEMObj = document.getElementById(tbEMId);
            with (tbEMObj) {
                    apos = value.indexOf("@");
                    dotpos = value.lastIndexOf(".");
                    if (value == '') {
                        alert('field can not be blank');
                    }
                    else if (apos < 1 || dotpos - apos < 2) {
                        alert('please enter correct email');
                        return false;
                    }
             }
        }

 

Regular Expression javascript code:

function IsEmailAddress(txtEmailID) {
    var emlRegex = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
    var txtemail = document.getElementById(txtEmailID);
    if (mob.test(txtemail.value) == false) {
        alert("please enter correct email.");
        txtemail.focus();
        return false;
    }
    return true;
}




Popular posts from this blog

Merging multiple PDFs using iTextSharp in asp.net c#

In this article i will show you how to merge multiple pdfs into one using ITextSharp below is the two approach one is to pass your input files path, output file path (will be created if not exist) and another is pass direct input stream, output stream and it will write the merge files into output stream.

Uploading large file in chunks in Asp.net Mvc c# from Javascript ajax

Often we have a requirement to upload files in Asp.net, Mvc c# application but when it comes to uploading larger file, we always think how to do it as uploading large file in one go have many challenges like UI responsiveness, If network fluctuate for a moment in between then uploading task get breaks and user have to upload it again etc.

how $document.ready() is different from window.onload()

we often use window.onload() in javascript and $document.ready() in jquery and assume that both are same just jquery library wrap up javascript window.onload() and introduce $document.ready() but no there is much difference between them below is the explanation -

Scrollable Gridview with fixed headers in asp.net

horizontal and vertical scrollable Gridview with static header row.fixed header in gridview in asp.net.static header in gridview through java script.I was looking for a solution for this for a long time and found most of the answers are not working or not suitable for my situation i also find most of the java script code for that they worked but only with the vertical scroll not with the horizontal scroll and also combination of header and rows doesn't match.