how to set default value in FileUploadControl using Jquey?

how to set default value in FileUploadControl using Jquey?

hi all

I have a problem that I'm able to set default value in text box using jqury but don't know how to set default value in file upload control.
For filling textbox I'm using the following code:

$("#TextBox1").attr("value","Default value");


Please help to set fileupload control value using jquery?