function inc(element)
{		
	element.value=parseInt(element.value) +1;
}
function dec(element)
{
	element.value=parseInt(element.value)-1;
}

function showdiv(element)
{
  e=document.getElementById(element);
  if (e.style.display=="none") 
  { 
    e.style.display="block"; 
  }            
  else
  { 
    e.style.display="none"; 
  }
}