本文实例讲述了纯javascript实现ping功能的方法。分享给大家供大家参考。具体实现方法如下：
function ping(ip) { var img = new image(); var start = new date().gettime(); var flag = false; var isclosewifi = true; var hasfinish = false; img.onload = function() { if ( !hasfinish ) { flag = true; hasfinish = true; img.src = 'x:\\'; console.log('ping ' + ip + ' success. '); } }; img.onerror = function() { if ( !hasfinish ) { if ( !isclosewifi ) { flag = true; img.src = 'x:\\'; console.log('ping ' + ip + ' success. '); } else { console.log('network is not working!'); } hasfinish = true; } }; settimeout(function(){ isclosewifi = false; console.log('network is working, start ping...'); },2); img.src = 'http://' + ip + '/' + start; var timer = settimeout(function() { if ( !flag ) { hasfinish = true; img.src = 'x://'; flag = false ; console.log('ping ' + ip + ' fail. '); } }, 1500);}ping('www.google.com:80');
希望本文所述对大家的javascript程序设计有所帮助。