还有就是一个很简单的逻辑问题
代码:var ie = document.all ? 1 : 0
if(ie){var sidemenu = document.all.master;}假设document.all为真,那代码执行到if(ie)里ie的值是1还是document.all?1:0。我刚直接把var ie = document.all?1:0改为var = 1代码就出错了
代码:var ie = document.all ? 1 : 0
if(ie){var sidemenu = document.all.master;}假设document.all为真,那代码执行到if(ie)里ie的值是1还是document.all?1:0。我刚直接把var ie = document.all?1:0改为var = 1代码就出错了
var ie = 1;ie浏览器里面里面ie就是1。。其他不支持document.all里面 就是0
var = 1;
当然出错。
if(window.ActiveXObject){
alert('ie')
}else if(window.XMLHttpRequest){
alert('not ie')
}
我说的是var ie = 1; 打少了点....
function browser() {
var k = /(webkit)[ \/]([\w.]+)/, o = /(opera)(?:.*version)?[ \/]([\w.]+)/, i = /(msie) ([\w.]+)/, n = /(mozilla)(?:.*? rv:([\w.]+))?/, u = navigator.userAgent.toLowerCase(), h = k.exec(u) || o.exec(u) || i.exec(u) || u.indexOf("compatible") < 0 && n.exec(u) || [], b = { z: h[1] || "", v: h[2] || "0" }, r = {}; if (b.z) { r[b.z] = true; r.version = b.v; } if (r.webkit) { r.safari = true; } return r;
}
function fncheck() {
var brow;
if (browser().msie) brow = "msie";
if (browser().opera) brow = "opera";
if (browser().mozilla) brow = "mozilla";
if (browser().safari) brow = "safari";
alert("浏览器:" + brow + " " + browser().version);
}
</script>
<div onclick="javascript:fncheck();">click me</div>