function subshow(num)
{
var list=document.getElementById("subnav").getElementsByTagName("ul");
for(i=1; i <=list.length;i++)
{
document.getElementById("sub"+i).style.display = "none";
document.getElementById("sub"+num).style.display = "block";
}
}

function clo()
{
var list=document.getElementById("subnav").getElementsByTagName("ul");
for(i=1; i <=list.length;i++)
{
document.getElementById("sub"+i).style.display = "none";
}
}


var j=1;
function picshow(num)
{
var piclist=document.getElementById("show").getElementsByTagName("img");
if(num==1)
{		
j++;
	if(j>piclist.length)
	{
		j=1;
	}
	for(i=1; i <=piclist.length;i++)
	{
	document.getElementById("pic"+i).style.display = "none";
	document.getElementById("pic"+j).style.display = "block";
	}	
}
else
{
	j--;
	if(j==0)
	{
		j=piclist.length;
	}
	for(i=1; i <=piclist.length;i++)
	{
	document.getElementById("pic"+i).style.display = "none";
	document.getElementById("pic"+j).style.display = "block";
	}

}
}