function CheckForm(f) {
	/*
	if ((f.email.value == "") && (f.name.value == "")) {
		alert("Please insert your name and email address.");
		f.name.focus();
		return false;
	} else if (f.name.value == "") {
		alert("Please insert your name.");
		f.name.focus();
		return false;
	} else 
	*/
	if (f.email.value == "") {
		alert("Please insert your email address.");
		f.email.focus();
		return false;
	} 
	
	try {
		var re = new RegExp('([^\\+]*)\\+[^@]*(@.*)');
		if (f.email.value.match(re)) {
			f.email.value = f.email.value.replace(re, "$1$2");
			alert("Please insert your real email address.");
			f.email.focus();
			return false;		
		}
	} catch(e) {
	
	}
	
	try {
		var re = new RegExp('[a-z0-9!#$%&\'*+\/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&\'*+\/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?', 'i');
		if (!f.email.value.match(re)) {
			alert("Please insert a valid email address.");
			f.email.focus();
			return false;		
		}
	} catch(e) {
	
	}
	
	try {
	
		var re = new RegExp('@((uggsrock|brefmail|20minutemail|spamcero|slopsbox|30minutesmail|text2re|vansoftcorp|nomail2me|nowmymail|plasticinbox|saynotospams|shieldemail|skeefmail|imstations|mailcatch|mailzorz|meltmail|hidzz|1chuan|1zhuan|3d-painting|bodhi.lawlita|deadaddress|dodgit|e-mailzorz|emailrama|emailzorz|filzmail|gorillaswithdirtyarmpits|mt2009|trashymail|mytrashmail|trash2009|tyldd|maileater|10minutemail|2prong|4warding|6url|afrobacon|bugmenot|bumpymail|centermail|choicemail1|deadspam|despammed|discardmail|disposeamail|dodgeit|dontreg|dumpandjunk|e4ward|emailias|emailxfer|enterto|getonemail|gishpuppy|greensloth|guerrillamail|haltospam|jetable|kasmail|killmail|mail333|mailblocks|maileater|mailexpire|mailfreeonline|mailmoat|mailnull|mailshell|mailsiphon|mailzilla|mintemail|myspamless|mytrashmail|neomailbox|nobulk|noclickemail|netmails|oneoffemail|outlawspam|pancakemail|pookmail|punkass|rejectmail|sibmail|sneakemail|spamavert|spambob|spamslicer|spaml|spammotel|spamtrail|venompen|willselfdestruct|xemaps|xents|xmaily|yopmail|fakeinformation|fastacura|fastchevy|fastchrysler|fastkawasaki|fastmazda|fastmitsubishi|fastnissan|fastsubaru|fastsuzuki|fasttoyota|fastyamaha|fuckingduh|fux0ringduh|klassmaster|mailin8r|mailinator|thisisnotmyrealemail|mailinater|spamherelots|mailinator2|sogetthis|675hosting|amiriindustries|emailmiser|etranquil|gowikibooks|gowikicampus|gowikicars|gowikifilms|gowikigames|gowikimusic|gowikinetwork|gowikitravel|gowikitv|myspacepimpedup|ourklips|pimpedupmyspace|rklips|turual|upliftnow|uplipht|viditag|viewcastmedia|wetrainbayarea|xagloo|mailquack|mailslapping|oneoffmail|whopy|wilemail|spammotel|trashdevil|shiftmail|spambog|spamday|spamex|spamfree24|spamgourmet|spamhole|spamify|tempinbox|dotmsg|fakemailz|footard|forgetmail|lovemeleaveme|temporaryforwarding|temporaryinbox|trashmail|75hosting|myspaceinc|spamcorptastic|guerrillamailblock)\.com|(4warding|bio-muesli|mypacks|nervtmich|netmails|incognitomail|centermail|emz|guerrillamail|jetable|killmail|klassmaster|wuzup|link2mail|nervmich|nervtmichmails|privacy|shortmail|spambob|spamfree24|tempemail|trashmail|675hosting|75hosting|ajaxapp|amiri|etranquil|iwi|myspaceinc|viewcastmedia|mailinator|bsnow)\.net|(guerrillamail|teewars|walala|4warding|front14|h8s|hatespam|iheartspam|ipoo|jetable|mail2rss|spambob|oopi|poofy|spamcon|spamfree24|trashmail|wh4f|zoemail|675hosting|75hosting|etranquil|myspaceinc|viewcastmedia|wetrainbayarea|blogmyway|buyusedlibrarybooks)\.org|(bio-muesli|spamfree24|imails|kulturbetrieb)\.info|(sandelf|spamfree24|super-auswahl|wbb3|discardmail|dontsendmespam|dumpmail|emaildienst|emailto|ghosttexter|hidemail|spambog|trashdevil|trashmail|trash-mail|twinmail|wegwerfadresse|spaminator|spamoff|temporarily|sofort-mail|safersignup|nurfuerspam|meinspamschutz|messagebeamer|netzidiot)\.de|(nospamfor|spambox)\.us|(anonymail|recyclemail|lortemail)\.dk|(despam|tempmail)\.it|(tempomail)\.fr|(tempemail)\.biz|(spam)\.la|(slaskpost)\.se|(mail\.htl22)\.at|(0815|spambog)\.ru|(cust|great-host)\.in|(mx0\.wwwnew|spamfree24)\.eu|(recode)\.me)');

		if (f.email.value.match(re)) {
			alert("Please insert your real email address.");
			f.email.focus();
			return false;
		}
	
	} catch(e) {
	
	}
	
	return true;
};