if ( bits.length > 1 && bits[1].charAt( bits[1].length - 1 ) === 'x' ) {
ratioStr = bits[1].substr( 0, bits[1].length - 1 );
ratio = parseFloat( ratioStr );
if ( bits.length > 1 && bits[1].charAt( bits[1].length - 1 ) === 'x' ) {
ratioStr = bits[1].substr( 0, bits[1].length - 1 );
ratio = parseFloat( ratioStr );