function img_update2(s_cimg,next,prev,s_last){
	if ($("#shownow").size()>0){$("#g_bigimg").attr("src",$("#shownow").parent().attr("href"));}
	else {$("#g_bigimg").attr("src",$("#g_preview_1").attr("href"));}
	var i=s_cimg;
	while(i<=s_last){ $("#g_preview_"+i).css("display","none");i++;}
	
	var i=1;        
	while(i<=s_cimg){ $("#g_preview_"+i).css("display","inline");i++;}
	if (s_cimg < s_last){
		next.css("display","inline").css({opacity:1});
		prev.css("display","inline").css({opacity:0.2});  
	}
	$("a.g_trilan").click(function(){
		$("#g_bigimg").attr("src",$(this).attr("href"));
		return false;
	});     
}


$("document").ready(function(){
	var s_cimg = 3;
	var first = 1;
        var s_last_id = $("a.g_trilan:last").attr("id");
        var s_last = 0;
        if ( s_last_id ) {
	    s_last = s_last_id.match(/[\d\.]+/g);
        }
	//var s_last = $("a.g_trilan:last").attr("id").match(/[\d\.]+/g);
	var next = $("a.up");
	var prev = $("a.down");
	var i=1;        
	img_update2(s_cimg,next,prev,s_last);
	var now_spec = $("a.active");
	prev.click(function(){
		 if (first > 1){
			first -= 1;
			$("#g_preview_"+(first+s_cimg)).css("display","none");
			$("#g_preview_"+first).css("display","inline");
			if (first==1){
				prev.css({opacity:0.5});
				next.css({opacity:1});
						}
		else {
			prev.css({opacity:1});
			next.css({opacity:1});
			}
			
		 }
		 return false;
	});
	next.click(function(){
		 if ((first+s_cimg-1) < s_last){   
			$("#g_preview_"+first).css("display","none");
			$("#g_preview_"+(first+s_cimg)).css("display","inline");
			if ((first+s_cimg)==s_last){
				next.css({opacity:0.5});
				prev.css({opacity:1});
			}
			else {
			prev.css({opacity:1});
			next.css({opacity:1});
			}
			first += 1;
		 }        
		return false;
	});

});