function set_img_size(obj, width)   
{   
    if (!obj) return ;   
    if (!width) {   
        width = obj.clientWidth * 0.9;   
        if (width < 700) return; /*设置图片的限定宽度*/   
    }   
    img_items = obj.getElementsByTagName("img")   
    if (img_items)  {   
        for (i=0; i<img_items.length; i++) {   
            var s_width = img_items[i].width;   
            var s_height = img_items[i].height;   
            if (s_width > width) {   
                img_items[i].style.width = width + "px";   
                if (s_height == img_items[i].height) {   
                    img_items[i].style.height = ((width / s_width) * img_items[i].height) + "px";   
                }   
                img_items[i].onclick = function() {window.open(this.src)};   
                img_items[i].style.cursor = "pointer";   
                img_items[i].alt = "点击查看原始尺寸";   
            }   
        }   
    }   
}   
   
function selfadaptation_size() {   
    if (typeof(content_img_width) ==  undefined )   
        set_img_size(document.getElementById("right")); /*控制图片所在的元素ID号*/   
    else   
        set_img_size(document.getElementById("right"),700); /*控制图片所在的元素ID号*/   
}   
   
if (window.addEventListener)   
    window.addEventListener("load", selfadaptation_size, false);   
else if (window.attachEvent)   
    window.attachEvent("onload", selfadaptation_size);   
else   
    window.onload = selfadaptation_size;