function clearText(textbox, resetvalue) {
	if (textbox.value == resetvalue) textbox.value = '';
}

function resetText(textbox, resetvalue) {
	if (textbox.value == '') textbox.value = resetvalue;
}

$(document).ready(function() {
	$("#bullseye").submit(function(){
    var isFormValid = true;
    $("#bullseye input:text").each(function(){ // Note the :text
        if ($.trim($(this).val()).length == 0){
            $('input:text').addClass("invalid");
            isFormValid = false;
        } else {
            $('input:text').removeClass("invalid");
        }
    });
    if (!isFormValid) alert("Please enter your email address.");
    return isFormValid;
});
});