fullScreen

Insert the bleow code in Body Tag

<script>
<!--

/*
Full Screen Window Opener Script-
© Dynamic Drive (www.dynamicdrive.com)
For full source code, installation instructions,
100's more DHTML scripts, and Terms Of
Use, visit dynamicdrive.com
*/

function fullwin(targeturl){
window.open(targeturl,"","fullscreen,scrollbars")
}
//-->
</script>

<form>
<input type="button" onClick="fullwin('http://www.dynamicdrive.com')" value="Open window">
</form>