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/* * testledC.js * * Copyright (C) 2016 Ing. Stefano Salvi<stefano@salvi.mn.it> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, * MA 02110-1301, USA. */ function testLed() { var httpReq = new XMLHttpRequest(); httpReq.onreadystatechange = function() { if (httpReq.readyState == 4 && httpReq.status == 200) { var disp = document.getElementById("showbutton"); if (httpReq.responseText.indexOf('0') !== -1) { disp.className = 'off'; } else { disp.className = 'on'; } } }; httpReq.open("GET", "/cHW/testbutton.php", true); httpReq.send(); }