function showText(id)  
{  
	var elm = document.getElementById(id)
	elm.style.display = "block" 
}

function hideText(id)  
{
    try
    {
        var elm = document.getElementById(id)
    	elm.style.display = "none"
    }
    catch(err)
    {}
}

function disableGroup( prefix, num, start )
{
	
	for( var i = start, e; i <= num; ++i ) 
	{
		e = document.getElementById( prefix + i );
		if( e )
		{
			e.disabled = true;
			e.value = "";
			e.checked = false;
			e.selected = false;
			
		}
	}
}

function enableGroup( prefix, num, start )
{
	
	for( var i = start, e; i <= num; ++i ) 
	{
		e = document.getElementById( prefix + i );
		if( e )
		{
			e.disabled = false;
			
		}
	}
}

function IsNumeric(sText)
{
	if (isNaN(sText))
	{
		return false;
	}
	else
	{
		return true;
	}
}