function isEmail(strEmail){
	if((strEmail.indexOf('@') > -1) && (strEmail.indexOf('.') > -1) && (strEmail.length > 5)){
		return true;
	}
	return false;
}
function valNewsLetter(){
var str = "";
	if(document.frmNewsletter.txtNameInc.value == ""){
		str += "Please enter your name\r\n";
	}
	if(document.frmNewsletter.txtEmailInc.value == ""){
		str += "Please enter your email address\r\n";
	}
	else{
		if(!isEmail(document.frmNewsletter.txtEmailInc.value)){
			str += "Please enter a valid email address\r\n";
		}
	}
	if(str.length > 0){
		alert(str);
	}
	else{
		document.frmNewsletter.submit();
	}										
}