请问这个用if语句怎么做？

function ViewClick(){
    val.visible = true;
}
var month = 6;
var day = 30;

val.text = "不在此程序的查询范围"
function judge(){
    //代码编写区域
    
}

judge();

 
function ViewClick(){
    val.visible = true;
}
var month = 6;
var day = 30;
val.text = "不在此程序的查询范围"
function judge(){
    //代码编写区域
  if(month==3 && (day>=1 || day<=20)){
    val.text = "双鱼座"
  }
  else if((month==3 && day>=21) || (month==4 && day<=19)){
    val.text = "白羊座"
  }
  else if((month==4 && day>=20) || (month==5 && day<=20)){
    val.text = "金牛座"
  }
  else if((month==5 && day>=21) || (month==6 && day<=21)){
    val.text = "双子座"
  }
else if(month==6 && (day>=22 || day<=30)){
    val.text = "巨蟹座"
  }
}
judge();