function isEmpty(str){
	strRE = new RegExp( );
	strRE.compile( '^[\s ]*$', 'gi' );
	return strRE.test( str.value );
}

var testresults;
function notValidEmail( email )
{
	if (document.layers||document.getElementById||document.all)
	{
		var str=email.value
		var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
		if (filter.test(str))
			testresults=false;
		else{
			testresults=true;
		}
		return (testresults)
	}
	else
	{
		return false;
	}
}

function checkForm(form){
	if(isEmpty(form.intranet_login) ){
		alert("inlognaam verplicht");
		if(form.intranet_login.focus) form.intranet_login.focus();
		return false;
	}

	if(isEmpty(form.intranet_wachtwoord) ){
		alert("wachtwoord verplicht");
		if(form.intranet_wachtwoord.focus) form.intranet_wachtwoord.focus();
		return false;
	}
	return true;
}