add: $('#foo').css('opacity', ''); ok( $('#foo').css('opacity') == '1', "Assert opacity is 1 when set to an empty String" ); }); 
context: 	$.each("0,0.25,0.5,0.75,1".split(','), function(i, n) {		$('#foo').css('opacity', n);		ok( $('#foo').css('opacity') == parseFloat(n), "Assert opacity is " + parseFloat(n) + " as a String" );		$('#foo').css('opacity', parseFloat(n));		ok( $('#foo').css('opacity') == parseFloat(n), "Assert opacity is " + parseFloat(n) + " as a Number" );	});
meta: 1471	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/1471/1ac9d6fbeed214d59ea5c31a87ff2c19bb08dbc8/core.js/clean/test/unit/core.js