javascript判断文件是否存在实例代码
javascript判断文件是否存在1.客户端
<script language="javascript">
function FileExist()
{
var sfso=new ActiveXObject("Scripting.FileSystemObject");
var fPath="";
if(sfso.FileExists(fPath))
{
alert("Exist");
}
else
{
alert("Doesn't exist");
}
}
</script>
2.服务器端
<script language="javascript">
function FileExist()
{
var xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
xmlhttp.open("GET",FileURL,false);
xmlhttp.send();
if(xmlhttp.readyState==4)
{
if(xmlhttp.status==200) alert("Exist");
else if(xmlhttp.status==404) alert("Doesn't exist");
else alert("Don't know");
}
}
</script>
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