function displayMenu(layername) {
  if (document.all) {
    eval ("document.all." + layername + ".style.visibility = 'visible'");
  } 
  else if (document.layers && document.layers[layername]) {
    document.layers[layername].visibility = 'visible';
  }
  else if (document.getElementById) { 
	var obj = document.getElementById(layername);
    obj.style.visibility = "visible";
  }
} 
 
function hideMenu(layername) {  
  if (document.getElementById) { 
	var obj = document.getElementById(layername);
    obj.style.visibility = 'hidden';
  }
  else if (document.all) {
    document.all[layername].style.visibility = "hidden";
    //document.all.layer1name.style.visibility = 'hidden';
    //document.all.layer2name.style.visibility = 'hidden';
    //document.all.layer3name.style.visibility = 'hidden';
    //document.all.layer4name.style.visibility = 'hidden';
  }
  else if (document.layers) {
    document.layers[layername].visibility = "hide";
  }
} 

function MM_jumpMenu(targ,selObj,restore){ //v3.0
eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
if (restore) selObj.selectedIndex=0;
}

function popUp(url) {	sealWin=window.open(url,"win",'toolbar=0,location=0,directories=0,status=0,menubar=1,scrollbars=1,resizable=1,width=450,height=300');
self.name = "mainWin"; 
}

function changeURL(url) {
location.href=url
}