merge 2 arrays into 1

is it possible to easily merge 2 arrays into one?



consider the following (jscript)



var x = {};

x[1] = "One";

x[2] = "Two";



var y = {};

y[3] = "Three";

y[4] = "Four";



and then something like :

z = x <join> y;



z should now contain :

z[1] = "One";

z[2] = "Two";

z[3] = "Three";

z[4] = "Four";



Is it at all possible?