Customize add to cart bottom

Hi dear
I want use a image Instead of add to cart text. this code show add to cart text:

echo $this->cart->displayButton(JText::_('ADD_TO_CART'),'add',$this->params,$url,$this->ajax,'',$max,$min);

An easy way is to strip all present CSS from the button and instead utilise the "background-image" property and related ones.

I want add in php file and don't use css

Wow, you'll have several views to edit then with all the cons involved, unless you want it in only one or two...

Well, you should then be able to replace all button-related stuff with a source link to your image. Might still need some CSS then, but you'll see.