function getResolution() {
    var myWidth;
    var myHeight;

    if (typeof (window.innerWidth) == 'number') {

        //Non-IE 

        myWidth = window.innerWidth;
        myHeight = window.innerHeight;

    } else if (document.documentElement &&

(document.documentElement.clientWidth || document.documentElement.clientHeight)) {

        //IE 6+ in 'standards compliant mode' 

        myWidth = document.documentElement.clientWidth;
        myHeight = document.documentElement.clientHeight;

    } else if (document.body && (document.body.clientWidth || document.body.clientHeight)) {

        //IE 4 compatible 

        myWidth = document.body.clientWidth;
        myHeight = document.body.clientHeight;

    }
    if (myWidth > myHeight) {
        ob_post.AddParam('sWidth', myHeight);
        ob_post.AddParam('sHeight', myHeight);
    }
    else {
        ob_post.AddParam('sWidth', myWidth);
        ob_post.AddParam('sHeight', myWidth);
    }
    ob_post.post('default.aspx', 'SetzenSession');
}