Dropdown disabled

Hej

Jeg har nedenstående koden, hvor jeg gerne vil have at første punkt i dropdownen er disabled. Hvordan gør jeg det ?

<form name="photosearch" type="Get">

<select name="Cat" onchange="this.form.action='gallerythumb.asp?Cat='+this.value;this.form.submit();">

<option disabled="disabled"></option>
<%
set connCat = server.createobject("adodb.connection")
connCat.open strconn
set rsCat = server.createobject("adodb.recordset")
strSQLCat = "select distinct category from photographs"
rsCat.open strSQLCat, connCat
Do while Not rsCat.EOF%>
    <option value = "<%=rsCat("category")%>"
    <%If strCategory = rsCat("category") Then%>
      selected
    <%End If%>
    ><%=TruncateString(rsCat("category"),26)%></option>
<%
  rsCat.moveNext
  Loop
  rsCat.close
  connCat.close
%>
</select>
</form>