//pouziti: 
//<a href="relativni_cesta_k_obrazku" target="_blank" OnClick='ShowBig(this.href, "root", "nepovinny_popisek"); return false;'>
function ShowBig(obr,root,popisek)
	{
	an = navigator.appName ;
	av = parseInt(navigator.appVersion) ;
	if(an=="Microsoft Internet Explorer" && av>=4)
		{
		if(popisek) popisek=popisek.replace(/&/g,"%26") ;
		else popisek = "" ; 
		window.open(root+"showbig.php?obr="+obr+"&popisek="+popisek,"showbig","toolbar=no,scrollbars=no,location=no,status=no,width=200,height=100,resizable=no,menubar=no,directories=no") ;
		}
	else window.open(obr,"showbig") ;
	}