function showHide(block,text,makevisText,makeinvisText)
{
 var blockID=document.getElementById(block);
 var  textID=document.getElementById(text);

 if(blockID.style.display=='block')
 {
 	blockID.style.display='none';
 	textID.innerHTML=makevisText;
 }
 else
 {
 	blockID.style.display='block';
 	textID.innerHTML=makeinvisText;
 }

}

function show(block,link)
{
 var blockID=document.getElementById(block);
 var linkID=document.getElementById(link);
 blockID.style.display='block';
  linkID.style.display='none';
}

function addnote(code, unit_available)
 {
     window.open("addunit.php?code=" + code, "DisplayWindow" + code, "toolbar=no,directories=no,menubar=no,scrollbars=no,status=yes,resizable=no,width=680,height=500");
 }