Validate input type="file" field using javascript -

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i have form in user first select if want upload file. if yes 3 upload box displayed them.

on click of submit there javascript function checks empty fields. in function, if option upload file selected, checking if input type="file" empty.

the error facing after user select file upload, error message upload file still displayed.

here html code:

<!-- 3rd fieldset starts --> <fieldset class="fieldsetspace">     <legend class="legendtext">&nbsp; upload documents &nbsp;</legend>      <span id="yes"><input type="radio" name="rdouploaddocu" id="rdouploaddocuyes" tabindex="23" value="yes" onclick="javascript: showuploaddiv();" /></span>     &nbsp;yes have documents upload      <div id="divuploaddoc" style="display:none;">         <span class="contact_table">upload document 1 </span>          <input type="file" name="files[]" id="file1" class="txtconame" />          <span class="contact_table">upload document 2</span>          <input type="file" name="files[]" id="file2" class="txtconame" />          <span class="contact_table">upload document 3</span>          <input type="file" name="files[]" id="file3" class="txtconame" />     </div>     <?php echo $errorresumeupload; ?>     <br />     <span id="no"><input type="radio" name="rdouploaddocu" id="rdouploaddocuno" value="no" tabindex="24" onclick="javascript: hideuploaddiv();" /></span>     &nbsp;no not have documents upload      <div id="divuploadcheckerror" class="diverror"></div>  </fieldset>          <!-- 3rd fieldset ends -->

here js function:

else if (document.getelementbyid('rdouploaddocuyes').checked)  {            var upload1 =  document.getelementbyid('file1').value;     var upload2 =  document.getelementbyid('file2').value;     var upload3 =  document.getelementbyid('file3').value;      alert( upload1 );     alert( upload2 );     alert( upload3 );      if( ( upload1 == '' ) || ( upload2 == '' ) || ( upload3 == '' ) )     {         var objerrdiv = document.getelementbyid('divuploadcheckerror');         objerrdiv.innerhtml= 'please upload @ least 1 documents ';         objerrdiv.style.padding='4px 4px';         objerrdiv.style.visibility='visible';         objerrdiv.style.margin='10px 0px 2px 0px';         return false;     }     else     {         return false;     } }

any appreciated.

i think you're missing reset innerhtml of objerrdiv div.

else if (document.getelementbyid('rdouploaddocuyes').checked)  {            var upload1 =  document.getelementbyid('file1').value;     var upload2 =  document.getelementbyid('file2').value;     var upload3 =  document.getelementbyid('file3').value;     var objerrdiv = document.getelementbyid('divuploadcheckerror');      alert( upload1 );     alert( upload2 );     alert( upload3 );      if( upload1 == '' )     {          objerrdiv.innerhtml= 'please upload @ least 1 documents ';         objerrdiv.style.padding='4px 4px';         objerrdiv.style.visibility='visible';         objerrdiv.style.margin='10px 0px 2px 0px';         return false;     }     else     {         objerrdiv.innerhtml="";  // try adding         return false;     } }

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