Easyui 带小数点相减java写法

前提：input 框限制小数点位数是2

var a =  ($("#amount").numberbox('getValue') ==null ||$("#amount").numberbox('getValue') == "")?"0.00":$("#amount").numberbox('getValue') ;


var b =   ($("#price").numberbox('getValue') ==null ||$("#price").numberbox('getValue') == "")?"0.00":$("#price").numberbox('getValue') ;


var subValue = Number（a - b）.toFixed(2);