form validation

function formsubmit() { var empname = document.getElementById('emp_name').value; var email = document.getElementById('email').value; var phone = document.getElementById('phone').value; var address = document.getElementById('address').value; var username = document.getElementById('username').value; var pwd = document.getElementById('password').value; //store all the submitted data in astring. var formdata = 'empname=' + empname + '&emailid=' + email + '&phn=' + phone + '&address=' + address +'&uname=' + username+ '&password=' + pwd; // validate the form input if (empname == '' ) { alert("Please Enter Employee Name"); return false; } if(email == '') { alert("Please Enter Email id"); return false; } if(username == '') { alert("Please Enter Username"); return false; } if(pwd == '') { alert("Please Enter Password"); return false; } else { // AJAX code to submit form. $.ajax({ type: "POST", url: "storeempdata.php", //call storeemdata.php to store form data data: formdata, cache: false, success: function(html) { alert(html); } }); } return false; }