Suppose you have a image file in your custom module
Best way to take that image is
<img src="<?php echo base_path().drupal_get_path('module', 'module_name');?>/image_name.jpg" />
http://data.agaric.com/get-path-drupal-module-or-theme
Best way to take that image is
<img src="<?php echo base_path().drupal_get_path('module', 'module_name');?>/image_name.jpg" />
http://data.agaric.com/get-path-drupal-module-or-theme