javascript problems

[#1]

anyone know why this script doesn't work?

    var x10 = document.forms["add-absence"]["absencetype"].value;
    var x11 = document.forms["add-absence"]["length"].value;
    if ((x10 != "Medical") && (x11 == "Partial Day")) {
        alert("Partial Day can only be used for Medial absence");
        return false;
    }    

it's currently failing even when the x10 variable is "Medical"
basically x11 variable can only be accepted when x10 variable is "Medical".

[#2]

ignore me!
it does work... i was passing the wrong data into variable x11 !

[#3]

Sorry @chenks76 got to spend my 10p here. But for what it is worth if the data types you are comparing are of the same type then ideally you should be using === and not == (or !== -v- !=) . Using === does not do type conversion meaning that the operation is that bit quicker when the types are the same.

For example if you have:

var A = ‘1’ ;
var B = 1 ;

If you then ask if (A === B) then the answer is No, as they are not the same type but asking if (A == B) then you’d get true due to the applied type conversion.