var _POPUP_FEATURES = 'location=0,statusbar=1,menubar=0';

function isUndefined(v) {
    var undef;
    return v===undef;
}

function popper(src, w, h, features) {
	var winl = (screen.width - w) / 2;
	var wint = (screen.height - h) / 2;
	if (isUndefined(features)) {
		features = _POPUP_FEATURES;
	}
	winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+','+features;
	win = window.open( src.getAttribute('href'), src.getAttribute('target') || '_blank', winprops);
	if (win.focus) { win.focus(); }
	return win;	
}

function popunderwin( url ) {
	var width = '720';
	var height = '300';
	var p = 'scrollbars=no,resizable=no,toolbar=no,menubar=on,status=no,location=no,left=100,top=100,height=' + height + ',width=' + width;
	win2=window.open( url,"bw", p)
	window.focus();
}

function isemail(addy) {
	return /^\s*[A-Za-z\d][\w\.-]*@[\w-]+((\.[\w-]+)+)\s*$/.test(addy);
}

/*
cookies.js
	 Example File From "JavaScript and DHTML Cookbook"
	 Published by O'Reilly & Associates
	 Copyright 2003 Danny Goodman
*/

// utility function to retrieve a future expiration date in proper format;
// pass three integer parameters for the number of days, hours,
// and minutes from now you want the cookie to expire; all three
// parameters required, so use zeros where appropriate
function getExpDate(days, hours, minutes) {
	var expDate = new Date();
	if (typeof days == "number" && typeof hours == "number" && typeof hours == "number") {
		expDate.setDate(expDate.getDate() + parseInt(days));
		expDate.setHours(expDate.getHours() + parseInt(hours));
		expDate.setMinutes(expDate.getMinutes() + parseInt(minutes));
		return expDate.toGMTString();
	}
}

// utility function called by getCookie()
function getCookieVal(offset) {
	var endstr = document.cookie.indexOf (";", offset);
	if (endstr == -1) {
		endstr = document.cookie.length;
	}
	return unescape(document.cookie.substring(offset, endstr));
}

// primary function to retrieve cookie by name
function getCookie(name) {
	var arg = name + "=";
	var alen = arg.length;
	var clen = document.cookie.length;
	var i = 0;
	while (i < clen) {
		var j = i + alen;
		if (document.cookie.substring(i, j) == arg) {
			return getCookieVal(j);
		}
		i = document.cookie.indexOf(" ", i) + 1;
		if (i == 0) break; 
	}
	return null;
}

// store cookie value with optional details as needed
function setCookie(name, value, expires, path, domain, secure) {
	document.cookie = name + "=" + escape (value) +
		((expires) ? "; expires=" + expires : "") +
		((path) ? "; path=" + path : "") +
		((domain) ? "; domain=" + domain : "") +
		((secure) ? "; secure" : "");
}

// remove the cookie by setting ancient expiration date
function deleteCookie(name,path,domain) {
	if (getCookie(name)) {
		document.cookie = name + "=" +
			((path) ? "; path=" + path : "") +
			((domain) ? "; domain=" + domain : "") +
			"; expires=Thu, 01-Jan-70 00:00:01 GMT";
	}
}