function imge() {
    var allimg = document.getElementById("content").getElementsByTagName("img");
    for (i = 0; i < allimg.length; i++) {
        if (allimg[i].width > 620) {
            var xx = allimg[i].width;
            var yy = allimg[i].height;
            allimg[i].height = yy * (620 / xx);
            allimg[i].width = 620;
        }
    }

}

function bt(obj) {

    obj.className = "bts";

}
function bts(obj) {
    obj.className = "";

}


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