body, html {
    height: 100%;
	width:100%
    }

@media only screen
and (min-device-width : 320px)
and (max-device-width : 700px) 
and (orientation: portrait) {
    #header, #mainNav, #breadcrumbs, #bigScreenDiv {
        display : none 
    }	
	iframe, #content {
	position: absolute;
    top:0px;
    left:0px;
    width:100%;
    height:100%;
    }
}

@media only screen
and (min-device-width : 320px)
and (max-device-width : 700px) 
and (orientation: landscape) {
    #header, #mainNav, #breadcrumbs, #bigScreenDiv {
        display : none 
    }	
	iframe, #content {
	position: absolute;
    top:0px;
    left:0px;
    width:100%;
    height:100%;
    }
}