Not able to click on "checkbox"

Hi All,

I am new to selenium and now am trying Selenium iIDE running in testrunner mode (v0.8.3 [1879])

and stuck at " HOW TO CLICK ON on "checkbox"

1. it's not native check box, it's a image as a square box .

2. user click the image (check box) only CSS style property is changed (style="background-position: 0pt -38px;)
( image is not changed)

3. i have tried in Selenium IDE 1.5.0 using "Clickat" it works but it's helpful in testrunner mode .

Please anyone help me to fix this issue. Thanks in advance

Regards
Ramesh kumar

Try to locate check box as image
For your reference
xpath=//img[@src='/images/logo_home.png']
xpath=//img[@alt='test']
//img[@src='/images/logo_home.png']