jquery得到font-size属性值实现代码

var fontSize = $(this).attr('style',function(i,s){ 
return s.replace(/font-size:\s*(\d+.{0,1}\d*)/, function(a){ 
return a + 'px'; 
}); 
}); 
//console.debug("font-size: "+ $(this).attr('style').match(/(?:font-size:)s*(\d+.{0,1}\d*)/)); 

var style = $(this).attr('style'); 
var fontSize = $(this).css('font-size',function(){ 
var s = style.match(/(?:font-size:)s*(\d+.{0,1}\d*)/)[0].replace(/font-size:/,''); 
return s; 
});