Optional Upload?

Commenting out the following foure lines (marked in red)

 in the check extensions script worked for me, as follows

comments?

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function checkFileUpload(form,extensions) { //v1.0
  document.MM_returnValue = true;
  if (extensions && extensions != '') {
    for (var i = 0; i<form.elements.length; i++) {
      field = form.elements[i];
      if (field.type.toUpperCase() != 'FILE') continue;
//      if (field.value == '') {
//       alert('File is required!');
//        document.MM_returnValue = false;field.focus();break;
//      }
      if (extensions.toUpperCase().indexOf(getFileExtension(field.value).toUpperCase()) == -1) {
        alert('This file is not allowed for uploading!');
        document.MM_returnValue = false;field.focus();break;
  } } }
}

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SAM

Hi,  I may be just plain stupid but I do not understand your fix for the optional upload?  Please can you explain exactly what I have to do?

Many Thanks

Phil