Replace text but keep links in google chrome extension content scripts

Question

I am trying to replace words on google chrome but have run into an issue. I am able to successfully replace specific words but it kills associated html links.

How can I keep links live and still replace text?

This is the code in my chrome extension content scripts:

wordDict = {"the":"piano","and":"Hello", "a":"huh?"};

for (word in wordDict) {
    document.body.innerHTML = document.body.innerHTML.replace(
        new RegExp('\\b' + word + '\\b',"gi"), wordDict[word]
    );
};

Answer 1

Okay! 2 Weeks later I finally resolved the issue. What was being ignored were the childnodes inside the DOM. The code I am using below effectively addresses the childnodes and maintains the original appearance of the script!

function replaceText(jsonArr) {
$("body *").textFinder(function() {
    for (var key in jsonArr) {
        var matcher = new RegExp('\\b' + key + '\\b', "gi");
        this.data = this.data.replace(matcher, jsonArr[key]);
    }
});
}

// jQuery plugin to find and replace text
jQuery.fn.textFinder = function( fn ) {
this.contents().each( scan );
// callback function to scan through the child nodes recursively
function scan() {
    var node = this.nodeName.toLowerCase();
    if( node === '#text' ) {
        fn.call( this );
    } else if( this.nodeType === 1 && this.childNodes && this.childNodes[0] && node !== 'script' && node !== 'textarea' ) {
        $(this).contents().each( scan );
    }
}
return this;
};