哪个帮个忙，把PHP函数修改为JS函数，谢谢！

Question

function bmrs($weight=0,$sex=1,$age){
switch ($age) { case   $age>=0 and $age<3:
$x=array(1=>array(60.9,-54),2=>array(61.0,-51)); $y=1;
break; case   $age>=3 and $age<10: $x=array(1=>array(22.7,495),2=>array(22.5,499));
$y=1; break;
case   $age>=10 and $age<18: $x=array(1=>array(17.5,651),2=>array(12.2,746)); $y=1;
break; case   $age>=10 and $age<18: $x=array(1=>array(17.5,651),2=>array(12.2,746));
$y=0.95; break; case   $age>=18 and $age<30: $x=array(1=>array(15.3,679),2=>array(14.7,496));
$y=0.95; break; case   $age>=30 and $age<60: $x=array(1=>array(11.6,879),2=>array(8.7,829));
$y=0.95; break; case    $age>=60: $x=array(1=>array(13.5,487),2=>array(10.5,596));
$y=0.95; break; default:
break;
}
return  ceil(($x[$sex][0]*$weight+$x[$sex][1])*$y); //对浮点数进行四舍五入 }自带参数这几个，前面二个是默认值吗？$weight=0,$sex=1,$age这二个代码，修改为JS，遇到了难度：case   $age>=0 and $age<3:
$x=array(1=>array(60.9,-54),2=>array(61.0,-51));
哪位帮个忙，把它修改为JavaScript的，谢谢。

Answer 1

function bmrs(weight,sex,age){
    var x=new Array(2),y=null; switch (true)
{ case age>=0 && age<3:
x[1]=new Array(60.9,-54),x[2]=new Array(61.0,-51); y=1;
break; case age>=3 && age<10: x[1]=new Array(22.7,495),x[2]=new Array(22.5,499);
y=1; break;
case age>=10 && age<18: x[1]=new Array(17.5,651),x[2]=new Array(12.2,746); y=1;
break; case age>=10 && age<18: x[1]=new Array(17.5,651),x[2]=new Array(12.2,746);
y=0.95; break; case age>=18 && age<30: x[1]=new Array(15.3,679),x[2]=new Array(14.7,496);
y=0.95;     break; case age>=30 && age<60: x[1]=new Array(11.6,879),x[2]=new Array(8.7,829);
y=0.95;     break; case age>=60: x[1]=new Array(13.5,487),x[2]=new Array(10.5,596);
y=0.95;     break; default:
   break;
} return Math.ceil((x[1][0]*weight+x[1][1])*y); }