Skip to main content

Javascript Email validation


Hi...all
In this post we are discussing about javascript validationof email.

ok.first of all check these things
the name of your form form1 for example
the name of your field email for example
the name of yout id email for example

now javascript means client side validation that you can perform by onclick or onsubmit event..

Suppose we use onclick event
in your html page code is

input type="botton" onclick="validate()"

Now we have to create javascript function


function validate()
{
// we can use name or email
1 if(document.form1.email.value!="")
{
2 if(document.form1.email.value.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) == -1)
{
3 alert("Invalid Email Address");
4 document.form1.email.focus();
5 return false;
}
}
Execution :
1 line checks the value of email field is blank or not
2 line if the condition of first line satisfy at that time line 2 checks some of content of that vlaue is proper or not in short it checks it is valid or not
3 line popup the message
4 that send the focus of your cursor on email field
5 it stop the execution
}
Labels:

Comments

Post a Comment

Popular posts from this blog

Number Format In Javascript

Number.toFixed() :                                 Formats any number for "x" number of trailing decimals. The number is rounded up, and "0"s are used after the decimal point if needed to create the desired decimal length.   var profits=2489.8237 profits.toFixed(3) //returns 2489.824 (round up) profits.toFixed(2) //returns 2489.82 profits.toFixed(7) //returns 2489.8237000 (padding)   Number.toPrecision() :                                   Formats any number so it is of "x" length. Also called significant digits. A decimal point and "0"s are used if needed to create the desired length.   var anumber=123.45 anumber.toPreci...
2 comments
Read more

Use of indexOf and charAt in javascript

indexOf(): The indexOf() method returns the position of the first occurrence of a specified value in a string. This method returns -1 if the value to search for never occurs. example :  <script type="text/javascript"> var str="Hello world!"; document.write(str.indexOf("d") + "<br />"); document.write(str.indexOf("WORLD") + "<br />"); document.write(str.indexOf("world")); </script> Output : 10 -1 6 charAt() The charAt() method returns the character at the specified index in a string. The index of the first character is 0, and the index of the last character in a string called "txt", is txt.length-1 <script type="text/javascript"> var str = "Hello world!"; document.write("First character: " + str.charAt(0) + "<br />"); document.write("Last character: " + str.charAt(str.l...
Post a Comment
Read more

Find extension of file in Php

In our scripting sometimes we need to upload such documents , at that time there should be a validation for proper file. For example in your system suppose there is a field for image upload , that is obvious in that field only image formats are allowed (jpg,jpeg,png,gif etc.). At that time you have to give a validation on that field. In Php to find the extension and validation here is your code :  <?php                     $image = $_FILES["file"]["name"];    // to fetch the file name             $n1=strripos($image,".");                     // to find the last position of "."             $v1 =substr($image,$n1);                  ...
1 comment
Read more