function checkMail(mail){
	var er = new RegExp(/^[A-Za-z0-9_\-\.]+@[A-Za-z0-9_\-\.]{2,}\.[A-Za-z0-9]{2,}(\.[A-Za-z0-9])?/);
	if(typeof(mail) == "string"){
		if(er.test(mail)){ return true; }
	}else if(typeof(mail) == "object"){
		if(er.test(mail.value)){
					return true;
		}
	}else{
		return false;
	}
}
function worldlinks() {
	if (document.getElementById) {
		if (document.getElementById('world').style.visibility == 'visible') {
			document.getElementById('world').style.visibility = 'hidden';
		} else {
			document.getElementById('world').style.visibility = 'visible';
		}
	}
}