function searchIntro(oEvent) {
    if (oEvent.keyCode)
        iAscii = oEvent.keyCode;
    else if (oEvent.which)
        iAscii = oEvent.which;
    else 
        return false;
    if (iAscii == 13) {
        oEvent.returnValue = false;
        oEvent.cancel = true;
        BuildQuery()
    }
}
function BuildQuery() {
    var keyword = document.getElementById("search_value").value;
    if (keyword == "") {
        alert("Please enter a search term")
    }
    else {
        window.location = "Search.aspx?keyword=" + keyword
    }
}