var globalLayer;
		CheckDivHeight("divCircuitdesign");
	function switchLayer()
    {    
    var whichLayer;
    if(globalLayer==null)
        return;
    
    whichLayer=globalLayer
    globalLayer=null;

	document.getElementById("imgCircuitdesign").src = "../images/dt_circuitdesign_top_off.gif";
    document.getElementById("imgRFblocksimulation").src = "../images/dt_RFblocksim_off.gif";
    document.getElementById("imgSystemlevelsimulation").src = "../images/dt_systemlevelsim_off.gif";
    document.getElementById("imgLayout").src = "../images/dt_layout_off.gif";
    document.getElementById("imgElectromagneticanalysis").src = "../images/dt_electromagneticanaly_off.gif";
    document.getElementById("imgParasiticextraction").src = "../images/dt_parasiticextraction_off.gif";
    document.getElementById("imgManufacturabilitysignoff").src = "../images/dt_manusignoff_off.gif";
    
	HideLayer("divCircuitdesign");
	HideLayer("divRFblocksimulation");
	HideLayer("divElectromagneticanalysis");
	HideLayer("divSystemlevelsimulation");
	HideLayer("divLayout");
    HideLayer("divParasiticextraction");
	HideLayer("divManufacturabilitysignoff");
	
	if(whichLayer.id == "imgCircuitdesign")
    {
		document.getElementById("imgCircuitdesign").src = "../images/dt_circuitdesign_top_on.gif";
		ShowLayer("divCircuitdesign");
    }
    if(whichLayer.id == "imgRFblocksimulation")
    {
		document.getElementById("imgRFblocksimulation").src = "../images/dt_RFblocksim_on.gif";
		ShowLayer("divRFblocksimulation");
    }
    if(whichLayer.id == "imgSystemlevelsimulation")
    {		
		 document.getElementById("imgSystemlevelsimulation").src = "../images/dt_systemlevelsim_on.gif";
		 ShowLayer("divSystemlevelsimulation");
    }
	if(whichLayer.id == "imgLayout")
    {
		 document.getElementById("imgLayout").src = "../images/dt_layout_on.gif";
		 ShowLayer("divLayout");
    } 
	if(whichLayer.id == "imgElectromagneticanalysis")
    {
		 document.getElementById("imgElectromagneticanalysis").src = "../images/dt_electromagneticanaly_on.gif";
		 ShowLayer("divElectromagneticanalysis");
    }	
  	if(whichLayer.id == "imgParasiticextraction")
    {
		document.getElementById("imgParasiticextraction").src = "../images/dt_parasiticextraction_on.gif";
		ShowLayer("divParasiticextraction");
    } 
	if(whichLayer.id == "imgManufacturabilitysignoff")
    {
		 document.getElementById("imgManufacturabilitysignoff").src = "../images/dt_manusignoff_on.gif";
		 ShowLayer("divManufacturabilitysignoff");
    } 
}

function switchLayerInit(whichLayer)
{        
  	globalLayer=whichLayer; 
    setTimeout('switchLayer();',300);
}

function switchLayerOut()
{
	globalLayer=null;

}

function HideLayer(divID)
{
	document.getElementById(divID).style.display = "none";
	document.getElementById(divID).style.visibility = "hidden";
}

function ShowLayer(divID)
{
	document.getElementById(divID).style.display = "block";
	document.getElementById(divID).style.visibility = "visible";
	CheckDivHeight(divID);
}
function CheckDivHeight(divID)
{
	if (document.getElementById(divID).offsetHeight < 650)
		{
			document.getElementById(divID).style.height= "650px"
		}
}

function findPosY(obj)
  {
    var curtop = 0;
    if(obj.offsetParent)
        while(1)
        {
          curtop += obj.offsetTop;
          if(!obj.offsetParent)
            break;
          obj = obj.offsetParent;
        }
    else if(obj.y)
        curtop += obj.y;
    return curtop;
  }