如果是图片的话可以，其他文件……
反正我不知道除了图片以外的文件如何检测（用fso除外）
检测图片的：
<script>
var img=null;
function ys()
{
if(img)img.removeNode(true);
img=document.createElement("img");
img.style.position="absolute";
img.style.visibility="hidden";
img.attachEvent("onreadystatechange",orsc);
img.attachEvent("onerror",oe);
document.body.insertAdjacentElement("beforeend",img);
img.src=inp.value;
}
function oe()
{
alert("cant load img");
}
function orsc()
{
if(img.readyState!="complete")return false;
alert("图片大小："+img.offsetWidth+"X"+img.offsetHeight);
alert("图片尺寸："+img.fileSize);
}
</script>
<input id=inp type="file">
<br>
<button onclick="ys()">Test</button>
反正我不知道除了图片以外的文件如何检测（用fso除外）
检测图片的：
<script>
var img=null;
function ys()
{
if(img)img.removeNode(true);
img=document.createElement("img");
img.style.position="absolute";
img.style.visibility="hidden";
img.attachEvent("onreadystatechange",orsc);
img.attachEvent("onerror",oe);
document.body.insertAdjacentElement("beforeend",img);
img.src=inp.value;
}
function oe()
{
alert("cant load img");
}
function orsc()
{
if(img.readyState!="complete")return false;
alert("图片大小："+img.offsetWidth+"X"+img.offsetHeight);
alert("图片尺寸："+img.fileSize);
}
</script>
<input id=inp type="file">
<br>
<button onclick="ys()">Test</button>
<script language="javascript">
function FileExist(strFile)
{
var FSO = new ActiveXObject("Scripting.FileSystemObject");
return FSO.FileExists(strFile);
}
</script>
传入文件全路径,返回一个布尔值.....
<html>
<head>
<SCRIPT LANGUAGE="JavaScript">
function check()
{ var FSO = new ActiveXObject("Scripting.FileSystemObject");
if(document.theform.title.value=="") {
document.theform.title.focus();
alert("请输入新闻标题!");
return false;
}
if(document.theform.D.value=="") {
document.theform.D.focus();
alert("请输入发表日期!!");
return false;
}
if(document.theform.note.value=="") {
document.theform.note.focus();
alert("请输入新闻内容!");
return false;
}
if(document.theform.picpath.value=="")){
if(NOT FSO.FileExists(document.theform.picpath.value)){
alert("你所选的图片不存在,请重新选择!");
return false;
}
}
return true;
}
</script>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>添加新闻</title>
</head><body>
<form method="post" name="theform" action="savenews.jsp" onsubmit="return check()">
<table width="100%" border="1" align="center">
<!--DWLayoutTable-->
<tr>
<td width="760"><div align="center">标题:
<input type="text" name="title">
</div></td>
</tr>
<tr>
<td><div align="center"> 发表日期:
<input type="text" name="D">
(年/月/日)</div></td>
</tr>
<tr>
<td height="29" valign="top"> <div align="center">新闻类型:
<select name="type">
<option value="1" selected>新闻</option>
</select>
</div></td>
</tr>
<tr>
<td height="560" valign="top"> <div align="center">内容: <font size="1">
<textarea name="note" cols="100" rows="40" ></textarea>
</font> </div></td>
</tr>
<tr>
<td height="31" valign="top"> <div align="center">选择图片(如果有就选择):
<input type="file" name="picpath">
<font size="1"> </font> </div></td>
</tr>
<tr>
<td height="32" valign="top"> <div align="center">
<input type="hidden" name="flag" value="0">
<input type="hidden" name="id" value="0">
<input type="submit" name="Submit" value="保存">
<input type="reset" name="Submit2" value="重置">
</div></td>
</tr>
<tr>
<td height="10"></td>
</tr>
</table>
</form></body>
</html>
function FileIfExist(filePath)
filePathStr=trim(filePath)
if filePathStr="" then
FileIfExist=false
else
set fso=server.createobject("SCRIPTING.FileSystemObject")
on error resume next
set anFile=fso.getfile(filepathStr)
if err then
FileIfExist=false
else
FileIfExist=true
end if
err.clear()
fso.close()
set fso=nothing
end if
end function
难道各位都不知道客户端使用fso会有安全警告的么……