function getWindowHeight() {
    var windowHeight=0;
    if (window.innerHeight && 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 getWindowWidth() {
    var windowWidth=0;
    if (window.innerWidth && typeof(window.innerWidth)=='number') {
        windowWidth=window.innerWidth;
    }
    else {
     if (document.documentElement&&
       document.documentElement.clientWidth) {
         windowWidth = document.documentElement.clientWidth;
    }
    else {
     if (document.body&&document.body.clientWidth) {
         windowWidth=document.body.clientWidth;
      }
     }
    }
    return windowWidth;
}