清除file框里的内容
<input type=file name=ttt>
<input type=button onclick="ttt.select();document.execCommand('Delete');" value=清除file框的内容>
<input type=file name=ttt>
<input type=button onclick="ttt.select();document.execCommand('Delete');" value=清除file框的内容>
我只想到了sendKey……