function clearTextBox()
{
obj = document.getElementById("tbNewsletter1");
if(obj.value == "type your mail address here...")
    {
    obj.value = "";
    obj.style.color = "White";
    }
}

function fillTextBox()
{
obj = document.getElementById("tbNewsletter1");
if(obj.value == "")
    {
    obj.value = "type your mail address here...";
    obj.style.color = "#c2c9c8";
    }
}