Javascript triangle project

So I'm trying to write a JS that takes the sides of triangles and determines if they're real or not. It keeps fucking up though and I have NO idea why.
Code:
//Gather input
var side1 = prompt("Input the length of side A(Not the longest).");
var side2 = prompt("Input the length of side B(Not the longest).");
var side3 = prompt("Input the length of side C(Longest side).");
//Create triangle object
var triangle = new Object();
//Find out if the triangle is real
real = function() {
if (side1 + side2 <= side3 || side2 + side1 <= side3) {
triangle.real = "not real";
}
else{
triangle.real = "real";
}
};
//Call functions and display answer
real();
alert("The triangle is " + triangle.real + ".");

No, I knew that it doesn't make a difference but I thought I'd try to see if that fixed it for some reason. Obviously doesn't do shit.

>>4

Because I'm just developing this as a way to test my skills, I'm . I'm just trying to get better at this.

Yeah I know. In some weird logic from me staring at it too long I thought that would do something for whatever odd reason.

And I'm not using Bools because I'm printing that (see last line)