Mega Code Archive
Complete Example
<![CDATA[
<html>
<body>
<img id="myI" src="yourimage.gif" alt="">
<script language="JavaScript">
var m = document.getElementById("myI").complete;
if (m == true) {
alert("The image is fully loaded");
} else {
alert("The image is not completely loaded")
}
</script>
</body>
</html>
]]>