[black_yurizan]

Hello, if the if statement has a statement with no conditions, like

if(document.getElementById)
{//do something
}

Does it mean that whenever document.getElementById is used at anytime it will do the if statement?

[Dormilich]

that wouldn’t qualify as "no contition". the above code is about the same as

if ("getElementById" in document) {
    // …
}

[black_yurizan]

Well if the condition is not equivalent(==) or not equal to (!=), then what is it telling to the if statement when its alone by itself

[Dormilich]

a condition doesn’t need a comparison operator. all it does is evaluate the given expression.

[BobRodes]

black, "if (whatever)" is the same as saying "if (whatever) == true". So, for example:

var x=1;
var y=0;
if (x) {alert ('foo')];
if (y) {alert ('bar')};

will alert "foo" but not "bar", because javascript will cast the 1 to true and the 0 to false.