change mouse event for product image magento

I want to change the product double click event on开发者_开发知识库 the product image to single click to enlarge the Image.

Go to:

/js/varien/product.js

Change

Event.observe(this.imageEl, 'dblclick', this.toggleFull.bind(this));

to

Event.observe(this.imageEl, 'click', this.toggleFull.bind(this));