Changing click to skip gallery to sliding photo gallery?

[tyanhly]

i just bought a joomla template from template monster.there is photo gallery on home page which skips to photos by clicking onto them.what i need is a self sliding photo gallery you know what i mean automatically skipping photos in preset interval.http://www.mirelmuhendislik.com/home-tr/index.phpthis is the homepage.i tried to do it by\[code\]function clicker() {document.getElementById('photo2').click();}setInterval("clicker()",5000);\[/code\]but it didnt work. i dunno why it didnt work is it because of javascript embedding options of joomla or is it because my javascript code??and how can i solve this problem?i'd be glad to see some suggestions please help :/