试图将“！important”附加到使用JS创建的内联样式

I'm working on an element that I need to be able to add '!important' to my inline style that I am dynamically creating using JS in order to override several CSS styles that exist in stylesheets developed by another person. Unfortunately, these stylesheets are used globally and this particular area has a slew of '!important's strung about through it that I cannot modify without risking altering previous headers that exist throughout the site. I'm fairly rough in my JS skills, thus am having a rough go of figure this out. I'm working on an element that I need to be abl