我们如何使用CasperJS自动化基于浏览器的下载窗口

i am stuck with the following scenario. the scenario is, in my web page i have some files and i need to download that one. When i click on download button it throws download window. And how to automate this thing. I am using CasperJS and SlimerJS....below is the html codei am stuck with the following scenario. the sce