[JS] - 清空file控件(兼容IE,火狐)

来源：http://yuanyong.javaeye.com/blog/654292

 

 

< script >
function cleanFile(id){
var _file = document.getElementById(id);
if (_file.files){
_file.value = "" ;
} else {
if ( typeof _file != " object " ){ return null ; }
var _span = document.createElement( " span " );
_span.id = " __tt__ " ;
_file.parentNode.insertBefore(_span,_file);
var tf = document.createElement( " form " );
tf.appendChild(_file);
document.getElementsByTagName( " body " )[ 0 ].appendChild(tf);
tf.reset();
_span.parentNode.insertBefore(_file,_span);
_span.parentNode.removeChild(_span);
_span = null ;
tf.parentNode.removeChild(tf);
}
}
</ script >
< input id ="file1" type ="file" />
< input type ="button" value ="清空" onclick ="cleanFile('file1')" />