var vis=0;
function showSelectedLayer(layerId)
{
	if(vis==0)
	{
		document.getElementById("arr").src=arr_on.src;
		
		document.getElementById(layerId).style.visibility='visible';
		document.getElementById(layerId).style.display='block';
		vis=1;
	}
	else if(vis==1)
	{
		document.getElementById("arr").src=arr_off.src;
		document.getElementById(layerId).style.visibility='hidden';
		document.getElementById(layerId).style.display='none';
		vis=0;
	}
}

function showImageInfo(lay_no)
{
	document.getElementById("three_box_info"+lay_no).style.display="block";
	if(lay_no==0)
	{
		document.getElementById("three_box_info1").style.display="none";
		document.getElementById("three_box_info2").style.display="none";
		document.getElementById("three_box_info3").style.display="none";
	}
	else if(lay_no==1)
	{
		document.getElementById("three_box_info0").style.display="none";
		document.getElementById("three_box_info2").style.display="none";
		document.getElementById("three_box_info3").style.display="none";
	}
	else if(lay_no==2)
	{
		document.getElementById("three_box_info1").style.display="none";
		document.getElementById("three_box_info0").style.display="none";
		document.getElementById("three_box_info3").style.display="none";
	}
	else if(lay_no==3)
	{
		document.getElementById("three_box_info1").style.display="none";
		document.getElementById("three_box_info2").style.display="none";
		document.getElementById("three_box_info0").style.display="none";
	}	
}

var qstring = window.location.search.substr(1);
var params = qstring.split('=');