javascript类型File的Input按钮功能研究

复制代码 代码如下:

import flash.net.FileReferenceList;
var fileRef:FileReferenceList = new FileReferenceList();
var allTypes:Array = [];
var 浏览类型:Object = new Object();
浏览类型.description = "浏览类型(*.mp3)";
浏览类型.extension = "*.mp3";
allTypes.push(浏览类型);
fileRef.browse(allTypes);

<script> function check(){ var filepath=path.value filepath=filepath.substring(filepath.lastIndexOf('.')+1,filepath.length) if(filepath != 'jpg' && filepath != 'gif') alert("只能上传JPG或GIF格式的图片") } </script> <input type=file name=path onpropertychange="check()"> (只能上传JPG或GIF格式的图片)
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]

<script> function ck(obj){if(obj.value.length>0){ var af="jpg,gif,png,zip,rar,txt,htm"; if(eval("with(obj.value)if(!/"+af.split(",").join("|")+"/ig.test(substring(lastIndexOf('.')+1,length)))1;")){alert("Allowed file types:\n"+af);obj.createTextRange().execCommand('delete')}; }} </script> <form> <input type=file name=path onpropertychange="ck(this)"/></form>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]