variable_exists()

Solving a problem with unexistent variables on fly in javascripts.

A definetive need to have!

function variable_exists()
{
	try
	{
		var ArgTest = typeof(eval(arguments[0]));       // Do the test, that gives us an error or a success

		// On sucess: Return the value of the variable content instead of a boolean if second argument is true
		if (typeof(arguments[1])=="boolean") return eval(arguments[0]);

		// On success: ... or return a truth value to indicate an existing variable
		return true;
	}
	catch (e)
	{
		// On error: Return a plain fail
		return false;
	}
}