function check_login() {
	var	errs = false;
	var alertMsg = "";

	if (echeck(document.login_form.email.value)==false) {
		alertMsg += " - Invalid email address!" + "\n";
		 errs = true;
	}

	if (document.login_form.pass.value== "" || document.login_form.pass.value==null) {
		alertMsg += " - Please, enter your password" + "\n";
		 errs = true;	
	}
		
	if (errs == true) {	
		alert (alertMsg)
		return false;
	}  else {
		return true;
	}
	
}