window.onload = function(){
		resizeBox();
}
window.onresize = function(){
	resizeBox();
}
resizeBox = function() {
    if (document.getElementById('box_right')) {
        var siteWidth = window.innerWidth || document.body.clientWidth;
        var siteHeight = window.innerHeight || document.body.clientHeight;

        var boxLeft = 805; //900 + (siteWidth-1200)/2;
        var boxWidth = siteWidth - boxLeft;

        document.getElementById('box_right').style.width = boxWidth + 'px';
        document.getElementById('box_right').style.height = "98%";
        document.getElementById('box_right').style.left = boxLeft + 'px';
        document.getElementById('box_right').style.top = '0px';
        document.getElementById('box_right').style.display = 'block';
    }
    // document.getElementById('box_left').style.display='none'; // there is no box_left element 
}