Template Reference Guide. ( TIP: Code blocks and variables are designed to be used specifically within their intended templates and will not be processed otherwise.) The 3dCart Template Engine gives you complete control over the layout of your store. The engine uses two techniques to automatically place content within the HTML templates: The code blocks define a snippet of HTML which the software can then use to create a part of the page, and or, if no data exists, remove it from the page leaving the rest of the page intact. The template engine can find this block of code, in this case it's called “BLOCKNAME”. Then, depending on what function it serves, either remove it completely or duplicate it as many times as necessary. DHTML menu, javascript menu, drop down menu for your Website! The Web framework for perfectionists with deadlines.