Display default Text Label for multiple TextBox using JavaScript

I use below code to show default watermark in textbox

   <script type="text/javascript">
        var defaultText = "Type here";
        function WaterMark(txt, evt) {
            if (txt.value.length == 0 && evt.type == "blur") {
                txt.style.color = "#b1b1b1";
                txt.value = defaultText;
            }

<asp:TextBox ID="Txtsearch" runat="server" CssClass="txtseA" Text="Type here"
       ForeColor="#b1b1b1" onblur="WaterMark(this, event);" onfocus="WaterMark(this, event);"></asp:TextBox>

            if (txt.value == defaultText && evt.type == "focus") {
                txt.style.color = "black";
                txt.value = "";
            }
        }
    </script>

now I have other textbox that I want put other watermark text on it so I worte below code

  <script type="text/javascript">
        var defaultText = "type in english";
        function WaterMark(txt, evt) {
            if (txt.value.length == 0 && evt.type == "blur") {
                txt.style.color = "#b1b1b1";
                txt.value = defaultText;
            }

<asp:TextBox ID="TxtEnglish" runat="server" CssClass="txtseA" Text="Type in english"
       ForeColor="#b1b1b1" onblur="WaterMark(this, event);" onfocus="WaterMark(this, event);"></asp:TextBox>
            if (txt.value == defaultText && evt.type == "focus") {
                txt.style.color = "black";
                txt.value = "";
            }
        }
    </script>

but it doesn't work

it just work  for one textbox when I add two javacode to show watermark on textbox it doesn't work

what should I do?

Best regards

neda