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var now = new Date();

now.toLocaleString(); // Tue Jun 14 2011 11:32:39 GMT-0400 (Eastern Daylight Time)
now.toGMTString(); // Tue, 14 Jun 2011 15:32:39 GMT (useful for setting browser cookies)
now.getTime(); // 1308065603585 (Unix epoch time in milliseconds since midnight of January 1, 1970)

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parseInt(x, 10) // 10 = decimal radix
parseFloat(x, 10)
x.toFixed(2)

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Math.PI      // 3.141592653589793
Math.E       // 2.718281828459045
Math.LN10    // 2.302585092994046
Math.LN2     // 0.6931471805599453
Math.LOG10E  // 0.4342944819032518
Math.LOG2E   // 1.4426950408889634
Math.SQRT1_2 // 0.7071067811865476
Math.SQRT2   // 1.4142135623730951

Math.random() // returns a number between 0 and 1

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try {

}
catch (ex) {
    console.error(ex);
}
finally {

}

psiborg

switch (letter) {
    case "a":
    case "e":
    case "i":
    case "o":
    case "u":
        // is a vowel
        break;
    case "y":
        // is sometimes a vowel

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var row = (cnt % 2 === 1) ? "odd" : "even";

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if () {

}
else if () {

}
else {

}

psiborg

// fast
var i = myArr.length;
while (i--) {
    console.log(i + ': ' + myArr[i]);
}

// while loop
var i = 0;
while (i < myArr.length) {
    console.log(i + ': ' + myArr[i]);

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for (var i = 0; i < myArr.length; i++) {
    //
}

for (var i = 0, ii = myArr.length; i < ii; i++) {
    // 20% faster
}

for (var i = myArr.length; i--;) {
    // 50% faster in reverse

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var myInt = 0,
    myFloat = 0.99,
    myOct = 0123, // 83
    myHex = 0xFFF, // 4095
    myBigExp = 9.8e6, // 9800000
    mySmallExp = 9.8e-6, // 0.0000098
    myMax = Number.MAX_VALUE, // 1.7976931348623157e+308
    myMin = Number.MIN_VALUE, // 5e-324
    myStr = "Hello",
    myBool = false,