imgload();
$(window).scroll(function () { settimeout(function () { imgload(); }, 200); });
//window.onscroll=(function (){settimeout(function (){imgload();},200); });
function imgload() {
    var offsetpage = window.pageyoffset ? window.pageyoffset : window.document.documentelement.scrolltop;
    var offsetwindow = offsetpage + number(window.innerheight ? window.innerheight : document.documentelement.clientheight);
    var imgarr = document.images;
    for (var i = 0; i < imgarr.length; i++) {
        if (imgarr[i]) {
            postpage = imgarr[i].getboundingclientrect().top + window.document.documentelement.scrolltop + window.document.body.scrolltop;
            postwindow = postpage + number(imgarr[i].height);

            if (imgarr[i].src != imgarr[i].getattribute("_src") && ((postpage > offsetpage && postpage < offsetwindow) || (postwindow > offsetpage && postwindow < offsetwindow))) {

                if (imgarr[i].getattribute("_src") != null && imgarr[i].getattribute("_src") != undefined) {
                    var _img = new image();
                    _img.src = imgarr[i].getattribute("_src");
                    //imgarr[i].height="200";
                    imgarr[i].src = _img.src;
                }
            } else {
                continue;
            }
        }
    }
}