function OpenLayer(a) 
{ 
	var x=document.getElementById(a);  
	if (x.style.visibility=='visible')
	{
		x.style.visibility='hidden';
	}
	else
  {
    var divs=document.getElementsByTagName('div');
    var j=0;	
    while(divs[j])
    {
    	if (divs[j].id.indexOf("Help") ==0)
  	  {
        divs[j].style.visibility='hidden';  		
    	}
      j++;
    }	   
  	x.style.visibility='visible';
  }
}

function CloseLayer(a)
{
  var x=document.getElementById(a);	
  x.style.visibility='hidden';  	  
}