function swap_plane(tt)
{
	switch(tt)
	{			
		case"link1":
		document.getElementById("link1").style.display ="block";
		document.getElementById("link2").style.display = "none";
		break;
		case"link2":
		document.getElementById("link1").style.display = "none";
		document.getElementById("link2").style.display = "block";
		break;		
		
		case"link3":
		document.getElementById("link3").style.display ="block";
		document.getElementById("link4").style.display = "none";
		document.getElementById("link5").style.display = "none";
		break;
		case"link4":
		document.getElementById("link3").style.display = "none";
		document.getElementById("link4").style.display = "block";
		document.getElementById("link5").style.display = "none";
		break;
		case"link5":
		document.getElementById("link3").style.display = "none";
		document.getElementById("link4").style.display = "none";
		document.getElementById("link5").style.display = "block";
		break;
		
		case"link7":
		document.getElementById("link7").style.display ="block";
		document.getElementById("link8").style.display = "none";
		break;
		case"link8":
		document.getElementById("link7").style.display = "none";
		document.getElementById("link8").style.display = "block";
		break;
		
		case"link9":
		document.getElementById("link9").style.display ="block";
		document.getElementById("link10").style.display = "none";
		document.getElementById("link11").style.display = "none";
		break;
		case"link10":
		document.getElementById("link9").style.display = "none";
		document.getElementById("link10").style.display = "block";
		document.getElementById("link11").style.display = "none";
		break;
		case"link11":
		document.getElementById("link9").style.display = "none";
		document.getElementById("link10").style.display = "none";
		document.getElementById("link11").style.display = "block";
		break;
		
		case"link12":
		document.getElementById("link12").style.display ="block";
		document.getElementById("link13").style.display = "none";
		document.getElementById("link14").style.display = "none";
		break;
		case"link13":
		document.getElementById("link12").style.display = "none";
		document.getElementById("link13").style.display = "block";
		document.getElementById("link14").style.display = "none";
		break;
		case"link14":
		document.getElementById("link12").style.display = "none";
		document.getElementById("link13").style.display = "none";
		document.getElementById("link14").style.display = "block";
		break;
		
		case"link15":
		document.getElementById("link15").style.display ="block";
		document.getElementById("link16").style.display = "none";
		document.getElementById("link17").style.display = "none";
		break;
		case"link16":
		document.getElementById("link15").style.display = "none";
		document.getElementById("link16").style.display = "block";
		document.getElementById("link17").style.display = "none";
		break;
		case"link17":
		document.getElementById("link15").style.display = "none";
		document.getElementById("link16").style.display = "none";
		document.getElementById("link17").style.display = "block";
		break;
		
		
		case"link18":
		document.getElementById("link18").style.display ="block";
		document.getElementById("link19").style.display = "none";
		document.getElementById("link20").style.display = "none";
		document.getElementById("link21").style.display = "none";
		break;
		case"link19":
		document.getElementById("link18").style.display = "none";
		document.getElementById("link19").style.display = "block";
		document.getElementById("link20").style.display = "none";
		document.getElementById("link21").style.display = "none";
		break;
		case"link20":
		document.getElementById("link18").style.display = "none";
		document.getElementById("link19").style.display = "none";
		document.getElementById("link20").style.display = "block";
		document.getElementById("link21").style.display = "none";
		break;
		case"link21":
		document.getElementById("link18").style.display = "none";
		document.getElementById("link19").style.display = "none";
		document.getElementById("link20").style.display = "none";
		document.getElementById("link21").style.display = "block";
		break;
		
		
		case"link22":
		document.getElementById("link22").style.display ="block";
		document.getElementById("link23").style.display = "none";
		document.getElementById("link24").style.display = "none";
		document.getElementById("link25").style.display = "none";
		break;
		case"link23":
		document.getElementById("link22").style.display = "none";
		document.getElementById("link23").style.display = "block";
		document.getElementById("link24").style.display = "none";
		document.getElementById("link25").style.display = "none";
		break;
		case"link24":
		document.getElementById("link22").style.display = "none";
		document.getElementById("link23").style.display = "none";
		document.getElementById("link24").style.display = "block";
		document.getElementById("link25").style.display = "none";
		break;
		case"link25":
		document.getElementById("link22").style.display = "none";
		document.getElementById("link23").style.display = "none";
		document.getElementById("link24").style.display = "none";
		document.getElementById("link25").style.display = "block";
		break;

	}
}


function MM_swapImgRestore() 
	{ //v3.0
	  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
	}

function MM_preloadImages() 
	{ //v3.0
	  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
		var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
		if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
	}

function MM_findObj(n, d) 
	{ //v4.01
	  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
		d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
	  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
	  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
	  if(!x && d.getElementById) x=d.getElementById(n); return x;
	}

function MM_swapImage() 
	{ //v3.0
	  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
	   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
	}