<style type="text/css">

html {
	overflow:auto;
}
body {
	height: 100%;
	width:100%;
	margin: 0;
	overflow:auto;
}

<!-- PUT YOUR CONTENT IN A DIV CALLED "minimum_size" -->
div.minimum_size {

min-width: 950px;
min-height: 550px;
width: 100%;
height: 100%;

<!-- FOR IE -->
width: expression( Math.max( document.body.clientWidth,950 ) + "px" );
height: expression( Math.max(document.body.clientHeight, 550 ) + "px" );
}

</style>