What is the difference between call and apply?

The difference is that apply lets you invoke the function with arguments as an array; callrequires the parameters be listed explicitly. A useful mnemonic is "A for array and C for comma."

See here and here.

Pseudo syntax:

theFunction.apply(valueForThis, arrayOfArgs)

theFunction.call(valueForThis, arg1, arg2, ...)

Sample code:

function theFunction(name, profession) {
    alert("My name is " + name + " and I am a " + profession + ".");
}
theFunction("John", "fireman");
theFunction.apply(undefined, ["Susan", "school teacher"]);
theFunction.call(undefined, "Claude", "mathematician");

via: http://stackoverflow.com/questions/1986896/what-is-the-difference-between-call-and-apply