I would like to know how I can use javascript to change a tag from one element to another. For instance, I might want to change a <a> tag with the id of "span" to a <span> tag. Any ideas on how to do this?

Although i am not able to get clear figure about your question, yet i think, you have to Rewrite whole html document with new tag using document.write()

You can't actually change one to another (as far as I know) but, you could replace one with another.
Something like this might get you started:

function transformTag(tagId){
    var elem = document.getElementById(tagId);
    var children = elem.childNodes;
    var parent = elem.parentNode;
    var newNode = document.createElement("span");
    for(var i=0;i<children.length;i++){
        newNode.appendChild(children[i]);
    }
    parent.replaceChild(newNode,elem);
}

I tried to upload/attach a demo html page but the forum rejected the file type. I copied the demo file to my site in the meantime.
http://willcode4beer.com/tips.jsp?set=tagSwap
I'm not messing with the attributes here but, its the same idea as the children.

Ya replacing the tag is just fine. Basicly the same thing.


Thanks a ton! That helped me alot