为什么背景颜色没有变化？

Question

I have javacript code that simply runs

document.bgColor = "darkblue"; 

per

Mozilla Documentation , however when I step throught the IE debugger, after executing that line the back ground color does not change.

Seems pretty straight forward. I'm assuming that bgColor refers to the CSS attribute background-color under the element body?

I can post the surrounding code if that helps.

Answer 1

This page has a large "deprecated" at the top of it. You should use the current method:

document.body.style.backgroundColor = 'darkblue';

This is stated in the MDN page you cited:

document.bgColor is deprecated in DOM Level 2 HTML. The recommended alternative is use of the CSS style background-color which can be accessed through the DOM with document.body.style.backgroundColor . Another alternative is document.body.bgColor , although this is also deprecated in HTML 4.01 in favor of the CSS alternative.

Answer 2

I'm not entirely sure what the problem is, but the solution is to use standards-compliant techniques using the style object:

document.body.style.backgroundColor = 'darkblue';