function CheckInput(field, nextfield) {
if (field.value.length > 4)  
 turnon(nextfield)
  else
 turnoff(nextfield);
 
}
function AllowSave(f,nextfield){
if (f.checked == true )
 turnon(nextfield)
  else
 turnoff(nextfield);
}

function SwitchOn(layername){
  turnoff(layername+'_small');
  turnon(layername+'_large');  
}
function SwitchOff(layername){
  turnon(layername+'_small');
  turnoff(layername+'_large');  
}

function turnon(nr)
{
	if (document.layers)
	{
		document.layers[nr].display = 'block';
	}
	else if (document.all)
	{
		document.all[nr].style.display = 'block';
	}
	else if (document.getElementById)
	{
		document.getElementById(nr).style.display = 'block';
	}
}

function turnoff(nr)
{
	if (document.layers)
	{
		document.layers[nr].display = 'none';
	}
	else if (document.all)
	{
		document.all[nr].style.display = 'none';
	}
	else if (document.getElementById)
	{
		document.getElementById(nr).style.display = 'none';
	}
}