function showEcard( x )
{
	hideEcards();
	var a = "#ecard_0" + x ;
	$j( a ).fadeIn("normal");
	$j("#selected_ecard").val( x );
}

function hideEcards()
{
	$j("#ecard_01").hide();
	$j("#ecard_02").hide();
	$j("#ecard_03").hide();
	$j("#ecard_04").hide();
	$j("#ecard_05").hide();
	$j("#ecard_06").hide();
}


function hideBackEcard()
{
	$j( "#ecard_chosen" ).fadeOut("slow",function()
	{
		$j( "#back" ).fadeIn("slow");
	});
}

function showFrontEcard()
{
	$j( "#back" ).fadeOut("slow",function()
	{
		$j( "#ecard_chosen" ).fadeIn("slow");
	});
}

function _ecardOrientation()
{
	var selected = $j("#selected_ecard").val();

	switch( selected )
	{
		case '2':
		case '4':
		case '6':
			return 'back_liggend';
			break;

		case '1':
		case '3':
		case '5':
			return 'back_staand';
			break;

	}
}

function checkInput( id )
{
	if( $j.trim($j("#"+ id ).val()) == '' )
	{
		$j("#"+ id).css("border","2px solid red");
		formErrors = true;
	}
	else
	{
		$j("#"+ id).css("border","2px solid #A4B97F");
	}
}

function checkInputEmail( id )
{
	var x = $j.trim($j("#"+ id ).val() );
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (filter.test(x))
	{
		$j("#"+ id).css("border","2px solid #A4B97F");
	}	
	else
	{
		$j("#"+ id).css("border","2px solid red");
		formErrors = true;
	}
}

var formErrors = false;

function checkForm()
{	
	formErrors = false;
	checkInput( "van" );
	checkInputEmail( "van_email" );
	checkInput( "naar" );
	checkInputEmail( "naar_email" );
	checkInput( "text" );

	if( formErrors == false )
	
		document.forms['previewForm'].submit();
	//else
	//	alert('not ok');
		
	return false;
}
function maxSizeText( id, max )
{
	t = $j("#"+ id).val() ;
	if( t.length > max )
	{
		$j("#"+ id).val( t.substring(0, max) );
		alert( 'U mag maximaal '+ max +' tekens gebruiken. ' );
	}
	
}