function getWindowHeight() {
                        var windowHeight = 0;
                        if (typeof(window.innerHeight) == 'number') {
                                windowHeight = window.innerHeight;
                        }
                        else {
                                if (document.documentElement && document.documentElement.clientHeight) {
                                        windowHeight = document.documentElement.clientHeight;
                                }
                                else {
                                        if (document.body && document.body.clientHeight) {
                                                windowHeight = document.body.clientHeight;
                                        }
                                }
                        }
                        return windowHeight;
                }
                function setContent() {
                        if (document.getElementById) {
                                var windowHeight = getWindowHeight();
                                if (windowHeight > 0) {
                                        var contentElement = document.getElementById('page-container');
                                        var contentHeight = contentElement.offsetHeight;
                                        if (windowHeight - contentHeight > 0) {
                                                contentElement.style.position = 'relative';
                                                contentElement.style.top = ((windowHeight / 2) - (contentHeight / 2)) + 'px';
                                        }
                                        else {
                                                contentElement.style.position = 'static';
                                        }
                                }
                        }
                }
                window.onload = function() {

                setContent();
                }
                window.onresize = function() {
                        setContent();
                }