// Check the Login form.
function checkLoginForm() {
    var login = document.getElementById("ctl00_ContentPlaceHolder1_txtLogin").value;
    var passwd = document.getElementById("ctl00_ContentPlaceHolder1_txtPasswd").value;
	
	if ( !login ) {
		alert("Please fill in login field.");
		document.getElementById("ctl00_ContentPlaceHolder1_txtLogin").focus();
		return false;
	} 
	
	if ( !passwd ) {
		alert("Please fill in password field.");
		document.getElementById("ctl00_ContentPlaceHolder1_txtPasswd").focus();
		return false;
	} 
	
	return true;
}