window.onload =  changeText;
function changeText(){
var haystackText = '';
var needle = 'beepdesign';
var needle2 = 'beepers';
var replacement = '<img src="http://beepdesign.nl/beepo.jpg" alt="" class="beepo" />';
var replacement2 = '<img src="http://beepdesign.nl/beepers.jpg" alt="" class="beepo" />';
if (haystackText.length == 0) {
	haystackText = document.getElementById("title").innerHTML;
}
var match = new RegExp(needle, "ig");  
var match2 = new RegExp(needle2, "ig");
var replaced = "";
replaced = haystackText.replace(match, replacement);
replaced = replaced.replace(match2, replacement2);
document.getElementById("title").innerHTML = replaced;
}