JS 问题整理 (1)

　　兼容Firefox/Opera/Safari/IE的处理方式，原文链接

var oFrm = document.getElementById('ifrm');
oFrm.onload = oFrm.onreadystatechange = function() {
     if (this.readyState && this.readyState != 'complete') return;
     else {
         onComplete();
     }
}