Question

How can I write a simple Greasemonkey script that allows it to search for a string of text on one website and then simply color it red?

For example, say a site had the words, "Normal Healthy (R11-0902 Gr 9)" … could we program this script to make all instances of this turn red? I would edit the script often to add additional strings to turn red.

Answer 1

Following code will highlight all the Greasmonkey in this page.

document.body.innerHTML= document.body.innerHTML.replace(/Greasemonkey/g, function(m){
    return '<span style="background-color:yellow">'+m+'</span>'
});

In your case the pattern would be something like /\w+ \w+ \(\w\d\d-\d{4} \w\w \d\)/. This will only work if your format of the word (Normal Healthy (R11-0902 Gr 9)) is consistent.

Other formats can be,

1. /\w+ \w+\([^\)]+\)/
   

2. /\w+ \w+\([^\s\w\d]+\)/