javascript onpropertychange事件疑惑,上全部代码,请指教,为什么它会在IEx下自动执行呢?
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<script src='jquery1.4.1.js'> </script>
</head>
<body>
<script>
window.onload=function(){
var ua=navigator.userAgent.toLowerCase();
var s=null;
var form =document.getElementById('form1');
var btn =document.getElementById('inp1');
var browser={
msie:(s=ua.match(/msie\s*([\d\.]+)/))?s[1]:false,
firefox:(s=ua.match(/firefox\/([\d\.]+)/))?s[1]:false,
chrome:(s=ua.match(/chrome\/([\d\.]+)/))?s[1]:false,
opera:(s=ua.match(/opera.([\d\.]+)/))?s[1]:false,
safari:(s=ua.match(/varsion\/([\d\.]+).*safari/))?s[1]:false
};
if(browser.msie)
{//若为IE浏览器
btn.onpropertychange=function(){
//do someting
alert('IE成功111111')
}
}
else{
btn.onchange=function(){
//do something
alert('成功')
}
}
}
</script>
<input type='file' id='inp1'/>
<form action='http://www.baidu.com' id='form1'>
<input type='text'/>
<input type='text'/>
<input type='text'/>
</form>
</body>
</html>
威廉-伯爵
11 years, 10 months ago