var isNav = isBrowser();
function GetLayerObj(myDiv) {
	if(isNav == "NS") {
    for(i=0; i<(document.layers.length); i++) {
      if(document.layers[i].name.search(myDiv) != -1) {return document.layers[i];}
	  }
  } else if (isNav == "IE"){
    var yydiv = document.all.tags("DIV");
    for (i=0; i<(yydiv.length); i++) {
      if (yydiv[i]) {var yydivname = yydiv[i].id;} else {var yydivname = '';}
      if (yydivname.search(myDiv) != -1) return document.all[yydivname];
     }
  } else if (isNav == "MZ"){
    var yydiv = document.getElementsByTagName("DIV");
    for (i=0; i<(yydiv.length); i++){
      if (yydiv[i]) {var yydivname = yydiv[i].id;} else {var yydivname = '';}
      if (yydivname.search(myDiv) != -1) return document.getElementById(yydivname);
    }
  } 
  return false;
}

function doLayer(doWhat,LayerObj,WhatParam) {
	if(LayerObj) {
    switch(doWhat) {
      case "show":
        if(isNav == "NS") LayerObj.visibility = 'show';
        if(isNav == "IE") LayerObj.style.visibility = 'visible';
        if(isNav == "MZ") LayerObj.style.visibility = 'visible';
      break;
      case "hide":
        if(isNav == "NS") LayerObj.visibility = 'hide';
        if(isNav == "IE") LayerObj.style.visibility = 'hidden';
        if(isNav == "MZ") LayerObj.style.visibility = 'hidden';
      break;    
      case "posLeft":
        if(isNav == "NS") LayerObj.left = WhatParam;
        if(isNav == "IE") LayerObj.style.posLeft = WhatParam;
        if(isNav == "MZ") LayerObj.style.left = WhatParam;
      break;
      case "posTop":
        if(isNav == "NS") LayerObj.top = WhatParam;
        if(isNav == "IE") LayerObj.style.posTop = WhatParam;
        if(isNav == "MZ") LayerObj.style.top = WhatParam;
      break;
    }
  }  
}
function show(showWhat) {
  var LayerObj;
  LayerObj = GetLayerObj(showWhat);
  doLayer('show',LayerObj,0);
}
function hide(hideWhat) { 
  var LayerObj;
  LayerObj = GetLayerObj(hideWhat);
  doLayer('hide',LayerObj,0);
}