code.html

<meta name="viewport" content="width=device-width, initial-scale=1.0,user-scalable=no">
<style type="text/css">
@media only screen and (max-device-width : 500px) {	
	.dialog{
	position: absolute;
	} 
	.dialog--open .dialog__overlay {
	height: 10000px;
	}
}
@media only screen and (min-device-width : 501px) and (max-device-width : 999px){	
	.dialog{
	position: absolute;
	} 
	.dialog--open .dialog__overlay {
	height: 10000px;
	}
}
@media only screen and (min-device-width : 1000px) {	

}
</style>
<script type="text/javascript">
$('.action-btn').click(function(){
    $("html, body").animate({ scrollTop: 0 }, 600);
    return false;
 });	
</script>