Clearing the data with in file upload control

Hi guys,
I 'm using a file upload control to upload images. i want to clear the file path with in the upload control once the image is saved..

I have tried the following code to clear the upload control. Initially it worked..but the problem is that , the parent page seems to be underdoing some process even after it is fully loaded. It all happened after I inserted the following code for clearing the upload control..

document.getElementById('updFileSignature').outerHTML = "<input type='file' name='updFileSignature' id='updFileSignature'>";

please giv me some other alternative to clear the contol..


thanx in advance..