My Solution to Project Euler in JavaScript

<mce:script language="JavaScript" type="text/javascript"><!--
for (var x = 1; x <= 100000; ++x) {
var t = 1 + 12*x*(x + 1);
var s = Math.sqrt(t);
if ((s*s == t) && ((1 + s) % 6 == 0)) {
var u = 1 + 4*x*(x + 1);
var v = Math.sqrt(u);
if ((v*v == u) && ((1 + v) % 4 == 0)) {
document.write(x*(x + 1)/2);
document.write("<br>");
}
}
}
// --></mce:script>