Edit in JSFiddle

Result
HTML
JavaScript
CSS

<body>
<div id="div">
</div>
<input type="button" id="b1" value="Press" onclick="div()">
</body>

function div()
{
var element=document.createElement("div");
var text=document.createTextNode("This is div effect.");
element.appendChild(text);
element.setAttribute("class","div");
document.getElementById("div").appendChild(element);
}

.div
{
border:solid 1px black;
}