Email and mobno Validation using Javascript in Asp.net

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I want to give the validation using javascript in asp.net for Mobno and Email

<script type="text/javascript">
function validate() {
var cno, email,Msg;

cno = document.getElementById("txt_Cno").value;
email = document.getElementById("txt_EmailID").value;

if (cno == "") {
Msg = Please Enter only No \n;
}
if (email == ) {
Msg +=Please valid Email \n;
}

return alert(Msg);

}
</script>

Posted 30-Jan-14 19:17pm

M.Thiyagaraja

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manvendra patel · Answer 1 · 2014-01-30T19:32:00

try this

C#

<script type="text/javascript">
function validate()
{
  if( document.mobilenumbervalidation.mobileno.value == "" ||
           isNaN( document.mobilenumbervalidation.mobileno.value) ||
           document.mobilenumbervalidation.mobileno.value.length != 10 )
   {
     alert( "Please provide a Mobile No in the format 123." );
     document.mobilenumbervalidation.mobileno.focus() ;

     return false;
   }
  if( document.mobilenumbervalidation.phoneno.value == "" ||
          isNaN( document.mobilenumbervalidation.phoneno.value) ||
          document.mobilenumbervalidation.phoneno.value.length != 10 )
  {
    alert( "Please provide a Phone No in the format 123." );
    document.mobilenumbervalidation.phoneno.focus() ;
    return false;
  }
   var email = document.mobilenumbervalidation.email_id.value;
  atpos = email.indexOf("@");
  dotpos = email.lastIndexOf(".");
 if (email == "" || atpos < 1 || ( dotpos - atpos < 2 ))
 {
     alert("Please enter correct email ID");
     document.mobilenumbervalidation.email_id.focus() ;
     return false;
 }

 return( true );
}
</script>

XML

<table   border="1"  bgcolor="#585858" width="20%"  align="center">
        <tr>
        <td>MobileNo</td>
        <td><input type="text" name="mobileno" id="mobileno" size="30"></td>
    </tr>
     <tr>
        <td>Phone No</td>
        <td><input type="text" name="phoneno" id="phoneno" size="30"></td>
     </tr>
    <tr>
        <td>Email_id</td>
        <td><input type="text" name="email_id" id="email_id"  size="30"></td>
    </tr>