// Validates the login form
function validate() {	
	if (document.login.username.value.length < 1 && document.login.password.value.length < 1) {		
		document.login.username.style.background = '#ffcc66';
		document.login.username.style.border = '1px solid #7f9db9';
		document.login.password.style.background = '#ffcc66';
		document.login.password.style.border = '1px solid #7f9db9';
		alert("Please enter your username and password.");
		document.login.username.focus();
		return false;
	}
	if (document.login.username.value.length < 1) {		
		document.login.username.style.background = '#ffcc66';
		document.login.username.style.border = '1px solid #7f9db9';
		if (document.login.password.value.length > 0) {	
			document.login.password.style.background = '#ffffff';
		}
		alert("Please enter your username.");
		document.login.username.focus();
		return false;
	}
	if (document.login.password.value.length < 1) {		
		document.login.password.style.background = '#ffcc66';
		document.login.password.style.border = '1px solid #7f9db9';
		if (document.login.username.value.length > 0) {	
			document.login.username.style.background = '#ffffff';
		}
		alert("Please enter your password.");
		document.login.password.focus();
		return false;
	}
	return true;
}