Use JS to highlight search keywords to implement code _JAVASCRIPT skills

Use JS to highlight the keyword specified by the article content

That is true..

Now there are these keywords: beauty, life, shopping
When these keywords appear in the article, highlight it.

The article is to generate static pages, and these keywords can be updated at any time, so I would like to use JS to achieve ...
Do not know how to achieve such a function AH? hereby ask for help

Copy Code code as follows:

<script language= "JavaScript" >
function Highlight (key) {
var key = Key.split (' | ');
for (var i=0; i<key.length; i++) {
var rng = Document.body.createTextRange ();
while (Rng.findtext (Key[i]))
Rng.pastehtml (Rng.text.fontcolor (' Red '));
Rng.pastehtml (' <div style= "border:1 solid red;display:inline" ><a href= "#" title= "+ Rng.text +" > "+ rng.text + ' </a></div> ');
}
}
Highlight (' article | key | function ')
</script>