18.5.1. line属性.html

javascript即用即差核心对象手册

<form>
   打开文件<input type="file" name="strfile"  onChange="readFile()"/>
   <div id="txt"></div>
</form>
<script>
   function readFile()
   {
        var oFso=new ActiveXObject("Scripting.FileSystemObject");
        var tsobj=oFso.OpenTextFile(document.forms[0].strfile.value);
        while(!tsobj.AtEndOfStream)
		{
	       ch=tsobj.read(1);
	       LineNum=tsobj.Line;
        }
        document.all("txt").innerText="该文件中共有"+LineNum+"行";
        tsobj.Close();
   }
</script>