function show_big_img(winnum,title,width,height,imgurl)
{
  im=window.open('','win'+winnum,'top=40,left=40,width=640,height=480,scrollbars=no,menu=no,status=yes,resizable=no');
  im.focus();
  im.document.open ("text/html");
  im.document.write ('<html><head><title>'+title+'</title></head><body leftmargin=0 topmargin=0 marginwidth=0 marginheight=0 bgcolor=#ffffff background="'+imgurl+'"></body></html>');
  im.document.close ();
}
var elem = null, timer = 0;
function mouseOver(toShow,id,elName,toTop)
{
        var a = null;
        if (elName) {
                a = document.getElementById ? document.getElementById(elName) : document.all ? document.all[elName] : null;
        }

        var open;
        if(!id) return;
        if(document.getElementById) open = document.getElementById(id);
        else if(document.all) open = document.all[id];
        else return;

        if(!open)return;

        if(timer){
                clearTimeout(timer);
                timer=0;
        }

        if (toShow && (!open.c_state || open.c_state == 2)) {
                if(elem && open!=elem)hideNow();
                if(a) {open.style.left = menuLeft(id,a,open,toTop); open.style.top = menuTop(id,a,open,toTop);}
                elem = open;
                if (a && a.alt) {
                        elem.c_a = a;
                        elem.c_alt = a.alt;
                        a.alt = '';
                }
                timer = setTimeout('showNow()',100);
        }
}
function mouseOut()
{
        if (timer)
                clearTimeout(timer);
        timer = setTimeout('hideNow()',100);
}

function showNow()
{
        if (elem) {
                        elem.style.visibility = 'visible';
        }
}
function hideNow()
{
        if (elem) {
                        elem.style.visibility = 'hidden';
        }
        elem = null;
}
function menuLeft(id,a,el,toTop)
{
        var pos = a.offsetLeft;
        while (a.offsetParent != null) {
                a = a.offsetParent;
                pos += a.offsetLeft;
                if (a.tagName == 'BODY') break;
        }
        if (pos+el.offsetWidth>=document.body.scrollLeft+document.body.clientWidth)
                pos=document.body.scrollLeft+document.body.clientWidth-el.offsetWidth;
        if (pos<document.body.scrollLeft) pos=document.body.scrollLeft;
        return pos;
}
function menuTop(id,a,el,toTop)
{
        var pos = a.offsetTop;
        while (a.offsetParent != null) {
                a = a.offsetParent;
                pos += a.offsetTop;
                if (a.tagName == 'BODY') break;
        } return toTop?pos-el.offsetHeight:pos+17;
}