js弹窗，父子窗口调用

http://www.runoob.com/jsref/met-win-open.html

function openwindow(url,name,iWidth,iHeight)
            {
                var url; //转向网页的地址;
                var name; //网页名称，可为空;
                var iWidth; //弹出窗口的宽度;
                var iHeight; //弹出窗口的高度;
    //window.screen.height获得屏幕的高，window.screen.width获得屏幕的宽
                var iTop = (window.screen.height-30-iHeight)/2; //获得窗口的垂直位置;
                var iLeft = (window.screen.width-10-iWidth)/2; //获得窗口的水平位置;
                return window.open(url,name,
                        'innerHeight='+iHeight+',innerWidth='+iWidth+',top='+iTop+',left='+iLeft+',' +
                        'toolbar=no,menubar=no,scrollbars=auto,resizeable=no,location=no,status=no,modal=yes');

            }
            var win=openwindow('text.html','_blank',300,300);
            win.document.write("<div style='color:red;300px;height:300px;border:1px solid red;'>diva </div>");