var SelMenu = "lay0";
var temp ="";

if (document.all) {
    // Internet Explorer Detected
      bgnText="";
      endText=".style.visibility = ";
      hideText="\"hidden\"";
      showText="\"visible\"";
  } else if (document.layers) {
   // Netscape Navigator Detected
      bgnText="document.";
      endText=".visibility = ";
      hideText="\"hide\"";
      showText="\"show\"";
  } else if (document.getElementById) {
    // Netscape 6 Detected
      bgnText="document.getElementById('";
      endText="').style.visibility = ";
      hideText="\"hidden\"";
      showText="\"visible\"";
  } else {
    // Unrecognized Browser Detected

 }

function showSelMenu(layName,mnID){
   if(SelMenu == ""){
      layShow = layName +"2";
      eval (bgnText + layShow + endText + showText + ";"); 
    }
    else{
      layHide = layName +"1";	
      layShow = layName +"2";	
    
      eval (bgnText + layShow + endText + showText + ";");
      eval (bgnText + layHide + endText + hideText + ";");
    } 
    temp = SelMenu ;
    SelMenu = layName;
  
    parent.frContent.location.href = "block.asp?menuid=" + mnID;  
  
}

function hideLayer(layName){
 layHide = layName +"2";
 layShow = layName +"1";

 if(SelMenu != layName){   
   eval (bgnText + layShow + endText + showText + ";");
   eval (bgnText + layHide + endText + hideText + ";"); 
 }
 else{
    if(temp != layName){ 
      if (temp == ""){
        temp = "lay1";
      }    
      layHide1 = temp +"2";
      layShow1 = temp +"1";
      eval (bgnText + layShow1 + endText + showText + ";");
      eval (bgnText + layHide1 + endText + hideText + ";"); 
   }
 }
}

function showLayer(layName){

 layHide = layName +"1";
 layShow = layName +"2";
  
 eval (bgnText + layShow + endText + showText + ";");
 eval (bgnText + layHide + endText + hideText + ";");
}

function showSelMenu4(layName,mnID){
   if(SelMenu == ""){
      layShow = layName +"2";
      eval (bgnText + layShow + endText + showText + ";"); 
    }
    else{
      layHide = layName +"1";	
      layShow = layName +"2";	
    
      eval (bgnText + layShow + endText + showText + ";");
      eval (bgnText + layHide + endText + hideText + ";");
    } 
    temp = SelMenu ;
    SelMenu = layName;
  
   // parent.frContent.location.href = "block.asp?menuid=" + mnID;  
  
}