function getCrtlPrefix()
{
	var prefix;             
	var    objCrtlPrefix = document.getElementById("ctrlPrefix");
	     

	if (objCrtlPrefix)

		 prefix = objCrtlPrefix.value;                 

	return prefix;
}

function $(s)
{
	var prefix = getCrtlPrefix();
	return document.getElementById(prefix + s);
}

function toggle(el)
{
	if (el.style.display == 'none')
	{
		el.style.display = 'block';
	}
	else
	{
		el.style.display = 'none';
	}
}

function hide(el)
{
	el.style.display = 'none';
}

function display(el)
{
	el.style.display = 'block';
}

function enable(el)
{
	el.disabled = false;
}

function disable(el)
{
	el.disabled = true;
	el.value = "";
}