HTML/CSS/CSS Attributes and Javascript Style Properties/zoom
"zoom" Example
<html>
<body>
<div id="myDiv"
style="width:100pt;
background-color:red;">
This is some sample text.
<br>
www.wbex.ru
</div>
<button onclick="myDiv.style.zoom="200%"">Zoom 200%</button>
<button onclick="myDiv.style.zoom="100%"">Zoom 100%</button>
</body>
</html>