Hy! Could you help me with that problem? I tought an aletrt box should appear.

Question

var n = new Array();
var m = new Array();

n[0] = 1
n[1] = 2

m[0] = 2
m[1] = 2
m[2] = 6

document.write(n.length );
document.write(m.length + "<br />");

function add (a,b){

document.write(a.length );
document.write(b.length + "<br />");

if(a.length = b. length){
document.write(a.length );
document.write(b.length + "<br />");
var x = new Array();
for (i=0; i<a.length; i++)
x[i] = a [i] + b [i]
return x
}

else{
alert("not egal length");
}
}

document.write("The result is: [" + add(n,m) + "]");

Answer 1

Use == in your if-statement instead of =.
== compares to values.
= assigns a value.

Answer 2

Thank You. Yeah. It was the problem. :)