var dragy=0,dragx=0;
var dragapproved=false;

function moveF(e)
{
    if (e.button==0)
    {
        window.scrollBy(dragx-e.pageX,dragy-e.pageY);
        dragy=e.pageY;
        dragx=e.pageX;
    }
}

function downF(e)
{
    dragy=e.pageY;
    dragx=e.pageX;
}


if (window.navigator.userAgent.indexOf("Firefox")>=1)
{
    document.onmousedown=function(e)
    {
        document.onmousemove=function(e)
        {
            moveF(e);
        }
    }
    document.onmouseup=function()
    {
        document.onmousemove=null;
    }
}
else
{
    document.onmousemove=function()
    {
        if ((event.button==0 || event.button==1)&&dragapproved)
        {
            window.scrollBy(dragx-event.clientX,dragy-event.clientY);
            dragy=event.clientY;
            dragx=event.clientX;
            return false;
        }
    }
    document.onmousedown=function()
    {
        dragy=event.clientY;
        dragx=event.clientX;
        dragapproved=true;
    }
    document.onmouseup=function()
    {
        dragapproved=false;
    }
}




function suitImage(img,w,h)
{
    var image=new Image();
    image.src=img.src;

    var iw=image.width;
    var ih=image.height;
    var iratio=iw/ih;

    if(iw>w)
    {
        iw=w;
        ih=w/iratio;
    }
    if(ih>h)
    {
        ih=h;
        iw=h*iratio;
    }
    img.width=iw;
    img.height=ih;
}