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asp.net JS判断FileUpload上传文件类型格式

2010-04-27 16:20:00| 分类：技术分享 | 标签： |举报 |字号大中小订阅

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function checkupload(){

var obj=document.getElementById('FileUpload1');

if(obj.value=='')

{

document.getElementById('message').innerHTML='请上传文件!';

return false;

}

var fileContentType=obj.value.match(/^(.*)(\.)(.{1,8})$/)[3]; //这个文件类型正则很有用：）

if (fileContentType == 'gif' || fileContentType == 'jpeg' || fileContentType == 'png' || fileContentType == 'jpg')

{

return true;

}else{

document.getElementById('message').innerHTML='上传文件格式不正确!';

return false;

}

return false;

}

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              blogAbstract:'<div\>function checkupload(){</div\><div\>       var obj=document.getElementById(\'FileUpload1\');</div\><div\>       if(obj.value==\'\')</div\><div\>         {</div\><div\>            document.getElementById(\'message\').innerHTML=\'请上传文件!\';</div\><div\>            return false;</div\><div\>         }</div\><div\>        var fileContentType=obj.value.match(/^(.*)(\\.)(.{1,8})$/)[3]; //这个文件类型正则很有用：）    </div\><div\>  </div\>',
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