function checkMail( sMail ) {
	var oFilter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if( oFilter.test( sMail ) ) 
		return true;
	return false;
}

function submitLogin() {
	if( !document.getElementById( "Form1" ).TextboxUsername.value ) {
		alert( "Enter your username, please." );
		return false;
	}
	else if( !document.getElementById( "Form1" ).TextboxPassword.value ) {
		alert( "Enter your password, please." );
		return false;
	}
	else
		document.getElementById( "Form1" ).submit();
}

function submitRegistration() {
	if( !document.getElementById( "Form1" ).TextboxFName.value || !document.getElementById( "Form1" ).TextboxLName.value ) {
		alert( "Enter your full name, please." );
		return false;
	}
	else if( !document.getElementById( "Form1" ).TextboxCompany.value ) {
		alert( "Enter your company name, please." );
		return false;
	}
	else if( !document.getElementById( "Form1" ).TextboxTitle.value ) {
		alert( "Enter your title, please." );
		return false;
	}
	else if( !document.getElementById( "Form1" ).TextboxEmail.value ) {
		alert( "Enter your e-mail address, please." );
		return false;
	}
	else if( !checkMail( document.getElementById( "Form1" ).TextboxEmail.value ) ) {
		alert( "Enter a valid e-mail address, please." );
		return false;
	}
	else if( !document.getElementById( "Form1" ).TextboxPhone.value ) {
		alert( "Enter your phone number, please." );
		return false;
	}
	else if( !document.getElementById( "Form1" ).SelectCountry.value ) {
		alert( "Select your country, please." );
		return false;
	}
	else
		document.getElementById( "Form1" ).submit();
}

function submitUM() {
	if( !document.getElementById( "Form1" ).TextboxUsername.value ) {
		alert( "Enter a username, please." );
		return false;
	}
	else if( !document.getElementById( "Form1" ).TextboxPassword.value ) {
		alert( "Enter a password, please." );
		return false;
	}
	else
		document.getElementById( "Form1" ).submit();
}