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<!DOCTYPE HTML>
<html>
<head>
<style>
body > div { border:1px solid black; margin:1em; }
div:first-line { color:green; }
div:first-letter { color:lime; }
.f:first-letter { float:left; }
</style>
<script>
function setH(id) {
document.getElementById(id).firstChild.data = "H";
}
function insertSpan(id) {
var d = document.getElementById(id);
var span = document.createElement("span");
span.textContent = "Hello";
d.insertBefore(span, d.firstChild);
}
function loaded() {
setH("d1");
setH("d2");
insertSpan("d3");
insertSpan("d4");
}
</script>
</head>
<body onload="loaded()">
<div> Hello<br>Kitty</div>
<div class="f"> <span>Hello</span><br>Kitty</div>
<div id="d1"> <span>ello</span><br>Kitty</div>
<div id="d2" class="f"> <span>ello</span><br>Kitty</div>
<div id="d3"> <span>Hello</span><br>Kitty</div>
<div id="d4" class="f"> <span>Hello</span><br>Kitty</div>
</body>
</html>