var windowInnerHeight=0;
var windowInnerWIdth=0;
function studycomfort_function_calculateWindowInnerWidthHeight()
{

    var div=document.createElement("DIV");
    div.style.position="absolute";
    div.style.left="0px";
    div.style.top="0px";
    div.style.width="100vh";
    div.style.height="100vh";
    document.body.appendChild(div);
    windowInnerHeight=div.getBoundingClientRect().bottom;
    windowInnerWidth=div.getBoundingClientRect().right;
    document.body.removeChild(div);
    return;

}