javascript判斷檔案是否存在

來源:互聯網
上載者:User

1. 用戶端

<script language="javascript">function FileExist(){   var sfso=new ActiveXObject("Scripting.FileSystemObject");  var fPath="[The path of the file]";  if(sfso.FileExists(fPath))  {           alert("Exist");  }  else  {    alert("Doesn't exist");      }}</script>

2. 伺服器端

<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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