function initSearchGadget() {
    var sg = document.getElementById("searchGadget");
    sg.onfocus = function() {
        if (this.value == "species or keywords") this.value = "";
    }
    sg.onblur = function() {
        if (this.value == "") this.value = "species or keywords";
    }
} // initSearchGadget()

addLoadEvent(initSearchGadget);