function ematch(e,blankisbad){
		if(e=='' && blankisbad){ return false; }
		return e.match(/^[0-9a-z_\-\.]+@[0-9a-z_\-\.]+\.[0-9a-z_\-\.]{2,3}$/i);
}



function us_phonematch(p,blankisbad){
	if(p=='' && blankisbad){ return false; } else if (!blankisbad && p==''){ return true; }
		var m1 = p.match(/^\([0-9]{3,}\)[0-9]{3,}-[0-9]{4,}$/);
		var m2 = p.match(/^[0-9]{3,}-[0-9]{3,}-[0-9]{4,}$/);
		var m3 = p.match(/^[0-9]{3,}-[0-9]{4,}$/);
		if((m1 + m2 + m3)==0){ return false; }
		return true;
}

function us_zipmatch(z,blankisbad){
	if(z=='' && blankisbad){ return false; }
	return z.match(/^[0-9]{5,}$/);
}



function badusphone_alert(ptype){
	alert('Please enter your '+ptype+' in one of the following accepted formats:\n\n555-555-5555\n(555) 555-5555\n(555)555-5555');
}
function baduszip_alert(dc){ 
	var digicount=5; if(dc){ digicount=dc; } alert('Please enter a valid '+digicount+'-digit US zip code.'); }