<script?type="text/javascript">
if(typeof?ActiveXObject?!=?"undefined")
{
var?version?=?['Msxml2.XMLHTTP.6.0','Msxml2.XMLHTTP.5.0','Msxml2.XMLHTTP.3.0','Msxml2.XMLHTTP','Microsoft.XMLHTTP'];
for(var?i=0;i<=version.length;i++)
{
try
{
var?obj?=?new?ActiveXObject(version[i]);
if(typeof?obj?!=?"undefined")
{
break;
}
}
catch(ex)
{
}
}
}
else??
{
var?obj?=?new?XMLHttpRequest();
}
alert(obj);
</script>如果ActiveXObject的類型!=未定義的，那么這個(gè)else判斷的是ActiveXObject=未定義？為什么出現(xiàn)兩次判斷undefined？if(typeof ActiveXObject != "undefined")if(typeof obj != "undefined")
關(guān)于Ajax判斷瀏覽器類型？
錯(cuò)過了年華
2017-05-23 20:23:36
