var lastImageURL	= '';

function updatePreviewImage()
{
	var thisText	= document.cart_quantity['id[txt_3]'].value;

	var thisFont	= document.getElementById( 'attrib-4' ).options[ document.getElementById( 'attrib-4' ).selectedIndex ].text;
	
	var thisTime	= new Date();
	
	thisTime		= thisTime.getTime();
	
	if( lastImageURL != 'image.php?font=' + escape( thisFont ) + '&text=' + escape( thisText ) + '&productID=' + escape( productID ) )
	{
		document.getElementById( 'polo_pocket_img' ).src	= 'image.php?font=' + escape( thisFont ) + '&text=' + escape( thisText ) + '&productID=' + escape( productID ) + '&time=' + escape( thisTime );
	}
	
	lastImageURL	= 'image.php?font=' + escape( thisFont ) + '&text=' + escape( thisText ) + '&productID=' + escape( productID );
	
	setTimeout( 'updatePreviewImage()', 3000 );
}

//setTimeout( 'updatePreviewImage()', 3000 );