validation in client side with coding example

java script validation in client side with explanation and give an example for 3tier achitecture with simple examples

Kousalya
07 Jul
1749 Views
6 Answers

SK

Saisuhas
07 Apr

JAVASCRIPT VALIDATION 
EG:<html>
<head>
<title> Data Validation </title>
<script language="javascript">
function validate()
{
var un=new RegExp("^[a-zA-Z]+$","g");
var pw=new RegExp("^[a-zA-Z0-9]+$","g");
var mob=new RegExp("^[0-9]+$","g");
var em=new RegExp("^[a-zA-Z0-9_.]+@[a-zA-Z0-9]+.[a-zA-Z]{2,4}$","g");
var uname=document.f1.t1.value;
var pwd=document.f1.t2.value;
var mobile=document.f1.t3.value;
var email=document.f1.t4.value;
if(uname.match(un)){
 if(uname.length>=6)  {
  if(pwd.match(pw))   {
   if(pwd.length>=8)      {
       if(mobile.match(mob))       {
         if(mobile.length==10)   {
              if(email.match(em))    {
                alert("Form is submitted successfully");
               }
else  {
                 alert("Invalid email");       }}
             else{
               alert("Mobile number should be 10 digits");    }           }
           else {
             alert("Invalid mobile number");   }          }
          else   {
             alert("password must be atleast 8 characters");     }        }
        else   {
           alert("Invalid password");     }      }
      else   {
         alert("user name must have atleast 6 characters");      }     }
else{
 alert("Invalid user name");}}
</script></head>
<body>
<form name="f1" onsubmit="validate()">
Username<input type="text" name="t1"><br>
Password<input type="password" name="t2"><br>
Mobile no<input type="mno" name="t3"><br>
email<input type="email" name="t4"><br>
<input type="submit" value="submit">
</form></body></html>

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JAVASCRIPT VALIDATION EG: Data Validation

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