var LCSendFormValidationGUID = '{E87BE786-CAEC-4FDC-8FB6-768F084CFED4}';

// alert('<input type="hidden" name="VAL_XYZ_LC_GUID" value="' + LCSendFormValidationGUID + '">');

document.write('<input type="hidden" name="VAL_XYZ_LC_GUID" value="' + LCSendFormValidationGUID + '">');