碰到一个需要根据页面内容调整窗口大小的需求，网上找到个解决方案，收藏

function win_onLoad(){
        var width = document.all["tblKsList"].offsetWidth;   
        var height = document.all["tblKsList"].offsetHeight;
        width = eval(width + 50);
        height = eval(height + 50);

        if (width < 500){
            width = 500;
        }else if (width > screen.width){
            width = screen.width;
        }

        if (height < 400){
            height = 400;
         }else if (height > screen.height){
             height = screen.height;
         }
         window.resizeTo(width,height);
    }