I want to upload mulitple image at a time , for more clarification i have mention below link
when you click on add photos , you can upload 20 picture at a time.
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http://drupal.org/project/swfupload is a widely-used multiple image upload module. There are installation instructions here and if you run into issues be sure to read through the issue queue before posting a support ticket!
How to install SWFUpload for Drupal 7:
Download the FileField module.
Place both modules, as well as the SWFUpload module, in your module
If you do not have created a 'libraries' directory yet, create one.
Create a new directory called 'swfupload' inside the 'libraries' folder.
Download the SWFUpload 220.127.116.11 release.
Copy the files 'swfupload.swf' and 'swfupload.js' to the swfupload folder
inside the libraries folder. The end result will read:
Enable this module by navigating to:
Ensure the library is available by visiting:
You may also want to consider http://drupal.org/project/multiupload_filefield_widget.
Used with his little brother http://drupal.org/project/multiupload_imagefield_widget, it should do the trick.
Really easy to install.
go for module plupload
kindly go through readme.txt for more information regarding module.