when resize window, html element id.cvs fit to full window size. using jquery. you should use this style also. html{overflow: hidden;}

resize.js

var resized,wid,hei;//global

resized=true
$(window).resize(function(){
    wid = window.innerWidth||document.documentElement.clientWidth||document.body.clientWidth;
    hei = window.innerHeight||document.documentElement.clientHeight||document.body.clientHeight;
    resized = true;
})

function render(){
	if(resized){
		$('#cvs').attr({width:wid,height:hei});
                resied = false
	}
}