function checkSearchForm() {
    //Check for a word to search
    if (document.frmSearch.txtSearchWords.value == "") {
        alert("Por favor ingrese al menos una palabra para buscar");
        document.frmSearch.txtSearchWords.focus();
        return false;
    }
    return true;
}
function buscadorTop() {
    document.write
	(
        '<form id="frmSearch" name="frmSearch" action="Buscador.aspx" method="post"> ' +
        '<table style="width: 870px; height: 100px" cellspacing="0" cellpadding="0" border="0" ' +
            'align="center"> ' +
            '<tbody> ' +
                '<tr> ' +
                    '<td width="46%" valign="middle"> ' +
                        '<img alt="" width="239" hspace="40" height="78" src="imagenes/logo_IADT_top.jpg" /> ' +
                    '</td> ' +
                    '<td width="34%"> ' +
                        '<input type="text" id="txtSearchWords" name="txtSearchWords" class="buscador" /> ' +
                        '<div class="btn_Gris_Left"> ' +
                        '</div> ' +
                        '<div class="btn_Gris_rigth" style="text-align: center"> ' +
                            '<a id="lnkSubmitSearch" name="lnkSubmitSearch" href="#" onclick="if (checkSearchForm()) { document.frmSearch.submit() }">BUSCAR</a> ' +
                        '</div> ' +
                    '</td> ' +
                '</tr> ' +
            '</tbody> ' +
        '</table> ' +
        '</form>'
	);
}