JS implementation code to obtain the number of days of the month based on the year and month_javascript skills

function getDaysInMonth(year,month){ 
month = parseInt(month,10); //parseInt(number,type)这个函数后面如果不跟第2个参数来表示进制的话，默认是10进制。 
var temp = new Date(year,month,0); 
return temp.getDate(); 
}