function checkEmail(formCalled){
	var tlds = ".ac .ad .ae .af .ag .ai .al .am .an .ao .aq .ar .as .at .au .aw .ax .az .ba .bb .bd .be .bf .bg .bh .bi .bj .bm .bn .bo .br .bs .bt .bu .bv .bw .by .bz .ca .cc .cd .cf .cg .ch .ci .ck .cl .cm .cn .co .cr .cs .cu .cv .cx .cy .cz .dd .de .dj .dk .dm .do .dz .ec .ee .eg .eh .er .es .et .eu .fi .fj .fk .fm .fo .fr .ga .gb .gd .ge .gf .gg .gh .gi .gl .gm .gn .gp .gq .gr .gs .gt .gu .gw .gy .hk .hm .hn .hr .ht .hu .id .ie .il .im .in .io .iq .ir .is .it .je .jm .jo .jp .ke .kg .kh .ki .km .kn .kp .kr .kw .ky .kz .la .lb .lc .li .lk .lr .ls .lt .lu .lv .ly .ma .mc .md .mg .mh .mk .ml .mm .mn .mo .mp .mq .mr .ms .mt .mu .mv .mw .mx .my .mz .na .nc .ne .nf .ng .ni .nl .no .np .nr .nu .nz .om .pa .pe .pf .pg .ph .pk .pl .pm .pn .pr .ps .pt .pw .py .qa .re .ro .ru .rw .sa .sb .sc .sd .se .sg .sh .si .sj .sk .sl .sm .sn .so .sr .st .su .sv .sy .sz .tc .td .tf .tg .th .tj .tk .tl .tm .tn .to .tp .tr .tt .tv .tw .tz .ua .ug .uk .um .us .uy .uz .va .vc .ve .vg .vi .vn .vu .wf .ws .ye .yt .yu .za .zm .zr .zw .com .net .org .mil .gov .edu .nato .info .int .name .biz .museum .pro";
	var myRegex = new RegExp("^[A-Za-z0-9\.\-_]+@[A-Za-z0-9\.\-_]+\.[A-Za-z]+$")
	var endofString = formCalled.email.value.split('.');
	var ending = endofString.length - 1;
	var tld = endofString[ending];
	if (! formCalled.email.value.match(myRegex) || tlds.search(tld) < 0) {
		return false;
	} else {
		return true;
	}
}
function checkJoinForm(formCalled){
	var errMsg = "";
	if (formCalled.firstname.value == ''){
		errMsg += "Please include your first name.\n";	
	}
	if (formCalled.lastname.value == ''){
		errMsg += "Please include your last name.\n";	
	}
	if (formCalled.email.value == '') {
		errMsg += "You must include an email address.\n";
	} else if (!checkEmail(formCalled)) {
		errMsg += "Please enter your email address in a correct format,\nlike email@domain.com.\n";
	}
	if (errMsg!="") {
		alert("Please correct the following:\n============================\n"+errMsg);
		return false;
	} else {
		// processing takes a while, just inserting a waiting message
		document.getElementById("submitWarn").innerHTML = "Processing your request.  Please be patient...";
		return true;
	}
}