function login() {
    if (document.client_login.cid.value == "")
    {
    	alert("Enter your client id");
    	document.client_login.cid.focus();
    	return false;
    }

    if (document.client_login.pwd.value == "")
    {
    	alert("Enter your password");
    	document.client_login.pwd.focus();
    	return false;
    }

    document.client_login.submit()

}