Netbeans background color

(I just want it so that I can easily browse my files, not just texts)

I am using Netbeans 7 and I want to know: can I mark functions / classes or blocks with a background color?

Example: I want to make the background of the function with the name getDate()green, then I only see this block with the green background:

// this block appears with a green background
function getDate() {
}


// this block appears with a red background
function setDate() {
}