// Check exchange form
function check_form(form) {

	if (form.url.value.length == 0) {
		alert("Site URL or domain name is blank!");
		return false;
	}

	if(form.url.value.search(/[\w\d\-\.]+\.[\w\d\-\.]+/) == -1) {
		alert("Invalid site URL or domain name!");
		return false;
	}

	if (form.password.value.length == 0) {
		alert("Password is blank!");
		return false;
	}

	if (form.email.value.length > 0 && form.email.value.search(/^[\w\d][\w\d\,\.\-]*\@([\w\d\-]+\.)+([a-zA-Z]+)$/) == -1 ) {
		alert("Invalid e-mail address!");
		return false;
	}

	if (form.code.value.length == 0) {
		alert("Word is blank!");
		return false;
	}

	if (form.email.value.length == 0) {
		if (!confirm("E-mail is blank! Submit password anyway?") == true) { return false } 
	}

	return true;
}