How to load css and javascript file runtime

Hi
In following function we demostrate that how to load css and javascirpt at runtime.


function loadjscssfile(filename, filetype){
if (filetype=="js"){ //if filename is a external JavaScript file
var fileref=document.createElement('script')
fileref.setAttribute("type","text/javascript")
fileref.setAttribute("src", filename)
}
else if (filetype=="css"){ //if filename is an external CSS file
var fileref=document.createElement("link")
fileref.setAttribute("rel", "stylesheet")
fileref.setAttribute("type", "text/css")
fileref.setAttribute("href", filename)
}
if (typeof fileref!="undefined")
document.getElementsByTagName("head")[0].appendChild(fileref)
}

loadjscssfile("myscript.js", "js") //dynamically load and add this .js file
loadjscssfile("javascript.php", "js") //dynamically load "javascript.php" as a JavaScript file
loadjscssfile("mystyle.css", "css") ////dynamically load and add this .css file


myscript.js" source:

var petname="Spotty"
alert("Pet Name: " + petname)

"mystyle.css" source:

#demotable td{
background-color: lightyellow;
}

#demotable b{
color: blue;
}


This code is taken from

http://javascriptkit.com/cutpastejava.shtml

Thanks
Help on desk