var p = new Poly9.URLParser('http://user:password@poly9.com/pathname?arguments=1#fragment');

/* OUT *
p.getHost() == 'poly9.com'
p.getProtocol() == 'http'
p.getPathname() == '/pathname'
p.getQuerystring() == 'arguments=1'
p.getFragment() == 'fragment'
p.getUsername() == 'user'
p.getPassword() == 'password'
*/

p.setURL('another.url.com');

/* OUT *
p.getHost() == 'another.url.com'
p.getProtocol() == ''
*/

<script type="text/javascript" src="prototype.js.gz"></script>

RewriteEngine on
RewriteCond %{HTTP_USER_AGENT} ".*Safari.*" [OR]
RewriteCond %{HTTP:Accept-Encoding} !gzip
RewriteRule (.*)\.jgz$ $1\.js [L]

AddType "text/javascript;charset=UTF-8" .jgz
AddEncoding gzip .jgz

function backToTop() {
	var x1 = x2 = x3 = 0;
	var y1 = y2 = y3 = 0;
	if (document.documentElement) {
		x1 = document.documentElement.scrollLeft || 0;
		y1 = document.documentElement.scrollTop || 0;
	}
	if (document.body) {
		x2 = document.body.scrollLeft || 0;
		y2 = document.body.scrollTop || 0;
	}
	x3 = window.scrollX || 0;
	y3 = window.scrollY || 0;
	var x = Math.max(x1, Math.max(x2, x3));
	var y = Math.max(y1, Math.max(y2, y3));
	window.scrollTo(Math.floor(x / 2), Math.floor(y / 2));
	if (x > 0 || y > 0) {
		window.setTimeout("backToTop()", 25);
	}
}

<a href="#" onclick="backToTop(); return false">
	このページの先頭へ
</a>

function fileLinks() {
    var fileLink;
    if (document.getElementsByTagName('a')) {
        for (var i = 0; (fileLink = document.getElementsByTagName('a')[i]); i++) {
            if (fileLink.href.indexOf('.pdf') != -1) {
                fileLink.setAttribute('target', '_blank');
                fileLink.className = 'pdfLink';
            }
            if (fileLink.href.indexOf('.doc') != -1) {
                fileLink.setAttribute('target', '_blank');
                fileLink.className = 'docLink';
            }
            if (fileLink.href.indexOf('.zip') != -1) {
                fileLink.setAttribute('target', '_blank');
                fileLink.className = 'zipLink';
            }
        }
    }
}
window.onload = function() {
    fileLinks();
}

a:hover {
    text-decoration: none;
}
.pdfLink {
    padding-right: 19px;
    background: url(pdf.gif) no-repeat 100% .5em;
}
.docLink {
    padding-right: 19px;
    background: url(doc.gif) no-repeat 100% .5em;
}
.zipLink {
    padding-right: 17px;
    background: url(zip.gif) no-repeat 100% .5em;
}

benchmark({
  'test1': function() {
    // do something
  },
  'test2': function() {
    // do something
  },
  'test3': function() {
    // do something
  }
});

benchmark({
  'getElementById': function() {
    document.getElementById('target');
  },
  'getElementsByTagName': function() {
    document.getElementsByTagName('target');
  },
  'Prototype\'s $ function': function() {
    $('target');
  }
});