el_count=1;

function counter_go(where)
{
	var el=document.getElementById("preview");
	var prev=document.getElementById("prev");
	var fwd=document.getElementById("fwd");
	var skin=document.getElementById("skin");
	var navblock=document.getElementById("navblock");
	
	switch(where)
	{
	case 'prev':
		el_count--;
		break;
	case 'fwd':
		el_count++;
		break;
	}
	
	if(el_count<=1)
	{
		prev.className="inactive";
		el_count=1;
	}else prev.className="";
	
	if(el_count>=5)
	{
		fwd.className="inactive";
		el_count=5;
	}else fwd.className="";
	
	if(skin.value < 0) navblock.style.visibility="hidden";
	else navblock.style.visibility="";
	
	el.src="/counter/preview/"+document.getElementById("type").value+"."+skin.value+"."+el_count+".png";
}