function email(username, domain, display){
	var email = username + '@' + domain;
	if(display == null)
		display = email;
	document.write('<a href="mailto:' + email + '">' + display + '</a>');
}

function get_hostname(url) {
   var new_url = url.replace(/http:\/\//i, '');
   new_url = new_url.replace(/www./i, '');
   var regexp = /[a-zA-Z0-9-]+\.[a-zA-Z.]{2,5}$/
   if (regexp.test(new_url)) {
       return (new_url.match(/(.[^/]+)/)[0].split('.')[0]);
   }
   else
       return '';   
}

function supply_domain() {
    var site = document.getElementById('website');
    var domain = document.getElementById('domain');
    if (site.value != '' && domain.value == '') {
    	domain.value = get_hostname(site.value); 
    }
}

function is_url_valid(url) {
    var regexp = /(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/
    return regexp.test(s);
}

function check_signup_form() {
    supply_domain();
    return true;
}
/*
 * Timezone functions
 */
 
function get_timezone_name() {
	tmSummer = new Date(Date.UTC(2005, 6, 30, 0, 0, 0, 0));
	so = -1 * tmSummer.getTimezoneOffset();
	tmWinter = new Date(Date.UTC(2005, 12, 30, 0, 0, 0, 0));
	wo = -1 * tmWinter.getTimezoneOffset();

	if (-660 == so && -660 == wo) return 'Pacific/Midway';
	if (-600 == so && -600 == wo) return 'Pacific/Tahiti';
	if (-570 == so && -570 == wo) return 'Pacific/Marquesas';
	if (-540 == so && -600 == wo) return 'America/Adak';
	if (-540 == so && -540 == wo) return 'Pacific/Gambier';
	if (-480 == so && -540 == wo) return 'US/Alaska';
	if (-480 == so && -480 == wo) return 'Pacific/Pitcairn';
	if (-420 == so && -480 == wo) return 'US/Pacific';
	if (-420 == so && -420 == wo) return 'US/Arizona';
	if (-360 == so && -420 == wo) return 'US/Mountain';
	if (-360 == so && -360 == wo) return 'America/Guatemala';
	if (-360 == so && -300 == wo) return 'Pacific/Easter';
	if (-300 == so && -360 == wo) return 'US/Central';
	if (-300 == so && -300 == wo) return 'America/Bogota';
	if (-240 == so && -300 == wo) return 'US/Eastern';
	if (-240 == so && -240 == wo) return 'America/Caracas';
	if (-240 == so && -180 == wo) return 'America/Santiago';
	if (-180 == so && -240 == wo) return 'Canada/Atlantic';
	if (-180 == so && -180 == wo) return 'America/Montevideo';
	if (-180 == so && -120 == wo) return 'America/Sao_Paulo';
	if (-150 == so && -210 == wo) return 'America/St_Johns';
	if (-120 == so && -180 == wo) return 'America/Godthab';
	if (-120 == so && -120 == wo) return 'America/Noronha';
	if (-60 == so && -60 == wo) return 'Atlantic/Cape_Verde';
	if (0 == so && -60 == wo) return 'Atlantic/Azores';
	if (0 == so && 0 == wo) return 'Africa/Casablanca';
	if (60 == so && 0 == wo) return 'Europe/London';
	if (60 == so && 60 == wo) return 'Africa/Algiers';
	if (60 == so && 120 == wo) return 'Africa/Windhoek';
	if (120 == so && 60 == wo) return 'Europe/Amsterdam';
	if (120 == so && 120 == wo) return 'Africa/Harare';
	if (180 == so && 120 == wo) return 'Europe/Athens';
	if (180 == so && 180 == wo) return 'Africa/Nairobi';
	if (240 == so && 180 == wo) return 'Europe/Moscow';
	if (240 == so && 240 == wo) return 'Asia/Dubai';
	if (270 == so && 210 == wo) return 'Asia/Tehran';
	if (270 == so && 270 == wo) return 'Asia/Kabul';
	if (300 == so && 240 == wo) return 'Asia/Baku';
	if (300 == so && 300 == wo) return 'Asia/Karachi';
	if (330 == so && 330 == wo) return 'Asia/Calcutta';
	if (345 == so && 345 == wo) return 'Asia/Katmandu';
	if (360 == so && 300 == wo) return 'Asia/Yekaterinburg';
	if (360 == so && 360 == wo) return 'Asia/Colombo';
	if (390 == so && 390 == wo) return 'Asia/Rangoon';
	if (420 == so && 360 == wo) return 'Asia/Almaty';
	if (420 == so && 420 == wo) return 'Asia/Bangkok';
	if (480 == so && 420 == wo) return 'Asia/Krasnoyarsk';
	if (480 == so && 480 == wo) return 'Australia/Perth';
	if (540 == so && 480 == wo) return 'Asia/Irkutsk';
	if (540 == so && 540 == wo) return 'Asia/Tokyo';
	if (570 == so && 570 == wo) return 'Australia/Darwin';
	if (570 == so && 630 == wo) return 'Australia/Adelaide';
	if (600 == so && 540 == wo) return 'Asia/Yakutsk';
	if (600 == so && 600 == wo) return 'Australia/Brisbane';
	if (600 == so && 660 == wo) return 'Australia/Sydney';
	if (630 == so && 660 == wo) return 'Australia/Lord_Howe';
	if (660 == so && 600 == wo) return 'Asia/Vladivostok';
	if (660 == so && 660 == wo) return 'Pacific/Guadalcanal';
	if (690 == so && 690 == wo) return 'Pacific/Norfolk';
	if (720 == so && 660 == wo) return 'Asia/Magadan';
	if (720 == so && 720 == wo) return 'Pacific/Fiji';
	if (720 == so && 780 == wo) return 'Pacific/Auckland';
	if (765 == so && 825 == wo) return 'Pacific/Chatham';
	if (780 == so && 780 == wo) return 'Pacific/Enderbury'
	if (840 == so && 840 == wo) return 'Pacific/Kiritimati';
	return 'US/Pacific';
}

function select_timezone(){
	var tz = get_timezone_name();
	var options = document.getElementById('timezone').options;
	for(var i=0; i<options.length; i++){
		if(options[i].value == tz)
			options[i].selected = true;
	}
}

function setfocus(){
	var bFound = false;

	if(document.forms == null)
		return;
		
	// for each form
	for (f = 0; f < document.forms.length; f++) {
		// for each element in each form
		for (i = 0; i < document.forms[f].length; i++) {
			try{
				document.forms[f][i].focus();
				var bFound = true;
			}
			catch(e){}
			
			// if found in this element, stop looking
			if (bFound == true)
					break;
		}
		// if found in this form, stop looking
		if (bFound == true)
			break;				
	}
}