String.localeCompare( that )

ようわからん

CSS

body{
    font-size: 12px;
    font-family:arial;
}
h1 { font-size: 1.5em; }

JavaScript

// String.prototype.localeCompare (that)
var echo = function(s) {
    var al = arguments.length, i = 0;
    if (al > 0) for (; i < al; ++i)
        document.body.innerHTML +=
            '<b style="font-size: 3em">' + String(arguments[i]) + "<b>" + "<br>";
};


echo(
    "AA".localeCompare( "AA" ),
    "AA".localeCompare( "BB" ),
    "1,2".localeCompare( [1,2] ),
    "[object DOMWindow]".localeCompare( window ),
    "[Xbject DOMWindow]".localeCompare( window )
);