// helper function for displaing results
var output = function(operator, result) {
document.getElementById(operator).innerHTML = result;
}
// variables
var a = 10;
var b = 99;
// a^=b, b^=a, a^=b - swap variables using XOR operation,
// details: http://en.wikipedia.org/wiki/XOR_swap_algorithm
a^=b, b^=a, a^=b;
output('a', a);
output('b', b);
a = 10<br/> b = 99<br/> Result: <p>a = <span id="a"></span></p> <p>b = <span id="b"></span></p>
span {
color: #f00;
}