SCRIPT CODE FOR VALIDATION

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>form</title>
<style type="text/css">
<!--
.style1 {color: #FF0000}
-->
</style>
<script>
function valid()
{
tname=document.frm.name.value;
teid=document.frm.email.value;
tmno=document.frm.phone.value;
tmsg=document.frm.comment.value;
if(tname=="")
{
alert("Pls. Fill Name");
document.frm.name.focus();
return false;
}
else if(teid=="")
{
alert("Pls. Fill Email");
document.frm.email.focus();
return false;
}
else if(tmno=="")
{
alert("Pls. Fill Mobile no");
document.frm.phone.focus();
return false;
}
else if(isNaN(tmno))
{
alert("Pls. Fill Mobile no in Numeric Format");
document.frm.phone.focus();
return false;
}
else if(tmsg=="")
{
alert("Pls. Fill Message");
document.frm.comment.focus();
return false;
}
return true;
}
</script>
</head>
<body>
<form name="frm" method="post"  onsubmit="return valid();" action="mailsend.php">
  <table width="316" height="236" border="1" align="center">
    <tr>
      <td width="95">NAME<span class="style1">*</span></td>
      <td width="89"> <input type="text" name="name" /> </td>
    </tr>
    <tr>
      <td>EMAIL-ID<span class="style1">*</span></td>
      <td> <input type="text" name="email" /> </td>
    </tr>
    <tr>
      <td>MOBILE NO<span class="style1">*</span></td>
      <td><label>
        <input type="text" name="phone" />
        </label></td>
    </tr>
    <tr>
      <td>MESSAGE<span class="style1">*</span></td>
      <td> <textarea name="comment" rows="5" cols="16"></textarea> </td>
    </tr>
    <tr>
      <td height="23"><label> <div align="center">
          <input type="submit" name="submit" value="submit" />
        </div></label>
      </td>
      <td><label> <div align="center">
          <input type="reset" name="reset" value="Clear" />
        </div></label>
      </td>
    </tr>
  </table>
</form>
</body>
</html>