sumadora

[arcanisgk122]

el problema esta en que el valor es numerico y lo estoy resiviendo como text... puedo trabajar de forma algebraica con esto?

hasta ahora tengo esto pero no me funciona y creo que puede ser simplificado:

var point=0;
function statpoint(){
var pointset = document.getElementById("pfrs");
var pointop1 = pointset.options[pointset.selectedIndex].text;
var atrset = document.getElementById("atr");
var atrpoint = atrset.options[atrset.selectedIndex].text;
switch ("pointop1"){
case "-50":
point=atrpoint+pointop1;
atrpoint = point;
break;
case "-40":
point=atrpoint+pointop1;
atrpoint = point;
break;
case "-30":
point=atrpoint+pointop1;
atrpoint = point;
break;
case "-20":
point=atrpoint+pointop1;
atrpoint = point;
break;
point=atrpoint+pointop1;
atrpoint = point;
case "-10":
point=atrpoint+pointop1;
atrpoint = point;
break;
case "0":
point=atrpoint+pointop1;
atrpoint = point;
break;
case "10":
point=atrpoint+pointop1;
atrpoint = point;
break;
case "20":
point=atrpoint+pointop1;
atrpoint = point;
break;
case "30":
point=atrpoint+pointop1;
atrpoint = point;
break;
case "45":
point=atrpoint+pointop1;
atrpoint = point;
break;
case "60":
point=atrpoint+pointop1;
atrpoint = point;
break;
case "80":
point=atrpoint+pointop1;
atrpoint = point;
break;
case "100":
point=atrpoint+pointop1;
atrpoint = point;
break;
case "125":
point=atrpoint+pointop1;
atrpoint = point;
break;
case "150":
point=atrpoint+pointop1;
atrpoint = point;
break;
case "200":
point=atrpoint+pointop1;
atrpoint = point;
break;
}
document.form1.atr.text = atrpoint;
}