function menuOn( _name ){
	document.getElementById(_name).className = "active";
	document.getElementById(_name + "_sub").style.display = "block";
}

function menuOff( _name ){
	document.getElementById(_name).className = "";
	document.getElementById(_name + "_sub").style.display = "none";

}

function isEmail(email) {
	emailRegExp = /^[\w\.\-]+@[\w\.\-]+\.[\w]{2,4}$/i;
	return emailRegExp.test(email);
}

function wopen(page, title, width, height, features) {
	if(!page)
		return false;

	if(!width)
		width = '500';

	if(!height)
		height = '550';

	if(!features)
		features = ', scrollbars=0,resizable=0,status=0';
		
	window.open( page, title, 'width=' + width + ' , height=' + height + features);
}