function pv_emailvalidator( value ) {
	if( /^\S+@\S+\.\S{2,4}$/.test( value ) ) return true;
	else return false;
}

function pv_addemailformfield( form, field, errormsg ) {
	pv_addvalidatefield( form, field, errormsg, pv_emailvalidator );
}

function pv_addemailfield( field, errormsg ) {
	pv_addvalidatefield( null, field, errormsg, pv_emailvalidator );
}