Use library: minidjvu.js
And BlobBuilder.js here.
HMTL:
<html>
<head>
<title>Simple online reader</title>
<script src="BlobBuilder.js"></script>
<script type='text/javascript' src='minidjvu.js'></script>
</head>
<body onload="drawdjvu()">
<script type='text/javascript'>
var pageNumber = 1;
function drawdjvu()
{
renderdjvu('data/'+pageNumber+'.djvu','djvucanvas')
}
</script>
<input type="button" onclick="pageNumber -= 1; drawdjvu()" value="<" />
<input type="button" onclick="pageNumber += 1; drawdjvu()" value=">" />
<input type='submit' onclick='document.getElementById("djvucanvas").width+=50; drawdjvu()' value='+' />
<input type='submit' onclick='document.getElementById("djvucanvas").width-=50; drawdjvu()' value='-' />
<br/>
<canvas id="djvucanvas" width="800" height="1200"></canvas>
</body>
</html>
