function zoomimg()
{
    var maxwidth = el("main").offsetWidth;
    maxwidth -= 300;
    images = document.getElementsByTagName("img").length;
    for(i=0;i<images;i++)
    {
        if(document.images[i].src!="http://login.ipark.cn/inc/Code.aspx")
        {
        document.images[i].style.width=document.images[i].style.height='';
        if(document.images[i].offsetWidth>maxwidth)
            {document.images[i].style.width=maxwidth +"px";}
         }
    }
    zoomdiv(maxwidth -40);
}
function zoomdiv(w)
{
    divs = document.getElementsByTagName("div");
    for(i=0;i<divs.length;i++)
    {
        if(divs[i].className.indexOf('postword')>=0)
        {
           divs[i].style.width=w +"px";
        }
    }
}

function zoomimgbydiv(divname)
{

   /* var maxwidth = document.getElementById(divname).offsetWidth;
    maxwidth -= 300;*/
    var maxwidth = 590;

    var images = document.getElementById(divname).getElementsByTagName("img"); 
    for(i=0;i<images.length;i++)
    {
        images.item(i).style.width=images.item(i).style.height='';
        if(images.item(i).offsetWidth>maxwidth)
            {images.item(i).style.width=maxwidth +"px";}
    }
//    zoomdiv(maxwidth -40);
}