html代码如下：
<html>
<body>
<form action= " ">
<input id= "file1 " type= "file " onchange= "var file1=document.getElementById( 'file1 ');file1.size=200; " />
</form>
在safari下怎么改不了file标签显示的长度呢？
------解决方案--------------------
try this :
<html>
<body>
<form action= " ">
<input id= "file1 " type= "file " onchange= "this.style.width = 500 " />
</form>