function show_mini(imgwidth, imgheight) {
mini_win.style.width=imgwidth+"px";
mini_win.style.height=imgheight+"px";
if (window.innerWidth) {
mini_win.style.left=(pageXOffset+window.innerWidth/2-imgwidth/2)+"px";
mini_win.style.top=(pageYOffset+window.innerHeight/-imgheight/2)+"px";
}
else {
mini_win.style.left=(document.body.scrollLeft+document.body.clientWidth/2-imgwidth/2)+"px";
mini_win.style.top=(document.body.scrollTop+document.body.clientHeight/2-imgheight/2)+"px";
}
document.all("mini_win").style.display="";
}

function close_mini(){
document.all("mini_win").style.display="none";
}