function validate(f1) {
           
                 if(isBlank(document.f1.old.value)){
                        alert("Enter the old password");
                        document.f1.old.focus();
                        document.f1.old.value=""
                        return (false)
                 }
                 else if (isBlank(document.f1.newpass.value)) {
                        alert ("Enter the new password ")
                        document.f1.newpass.focus();
                        document.f1.newpass.value=""
                        return (false)
                 }
                else if(isBlank(document.f1.confirm.value)) {
                        alert ("Enter the confirm password ")
                        document.f1.confirm.focus();
                        document.f1.confirm.value=""
                        return (false)
                 }
                 else if (document.f1.newpass.value != document.f1.confirm.value) {
                        alert ("Enter the password correctly ")
                        document.f1.confirm.value=""
                        return (false)
                }
                    
                else f1.submit();     
             
         
        }
        function valid(f1) {
            if(checkEmailid(f1.emailid)) {
                f1.submit(); 
            }
        }
        function checkEmailid(str) {
        if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(str.value)) { 
        return (true)
        }
        else{
        alert("Invalid E-mail Address! Please re-enter.")
        str.value=""
        str.focus();
        return (false)
        }
        }