How to get the inline elements for file upload.

I have wrote the following code into my JavaScript function for generating dynamic(n no of) file upload field. the inline code write into div tag

Code:

  for(i = 1; i <= count_1; i++) {
   code = code + "<textarea rows=2 cols=21 name=Description" + i
         + "  id=Description" + i + "></textarea>";

   for(j = 0; j < arr.length; j++) {
      code = code + "<input type=file  name=file" + j
             + "  id =file" + j + " class='browser' />";
   }
}

document.getElementById('range_type').innerHTML = code;

while submitting the form I get the Descriptions. but I'm unable to get the $_FILES details. I have used the form method is POST.
I have set the folowing attributes into my form tag.

Code:

  name = example
method='POST' 
style='display:inline;'
ENCTYPE='multipart/form-data' 
onsubmit='return validate form()' 

How to get the $_FILES details for uploading the files.