リンク
リンク
// JavaScriptが無効になっていればhoge.htmlにアクセス。有効ならばhoge()を実行。
リンク

リンク

t = "#ff8000";
c = 1000000;

function fnc1(){
	var h = t.substr(1,6);
	return parseInt("0x"+h);
}
function fnc2(){
	return parseInt(t.replace("#","0x"));
}
function fnc3(){
	return parseInt(t.split("#").join("0x"));
}

var st = (new Date()).getTime();
for(var n=0;n<c;n++){
	fnc1();
}
console.log("1: "+String((new Date()).getTime() - st));

var st = (new Date()).getTime();
for(var n=0;n<c;n++){
	fnc2();
}
console.log("2: "+String((new Date()).getTime() - st));

var st = (new Date()).getTime();
for(var n=0;n<c;n++){
	fnc3();
}
console.log("3: "+ String((new Date()).getTime() - st));

t = 0;
a = [1,2,1,2,1,2,1,1,1,3,10];
a.forEach(function(e){ t+=e;});
alert(t); // 25

t = 0;
a = [1,2,1,2,1,2,1,1,1,3,10];
a.forEach(function(e){ if(e==2)return; t+=e;});
alert(t); // 19

var Test = function(){
  this.hello = unk;
};
var a = new Test();
alert(a.hello);

var Test = function(){
  var hello = unk;
};
var a = new Test();
alert(a.hello);

function classOf(obj){
	if((typeof obj)=="object"){
		if(obj.length!=undefined)return "array";
		else{for(t in obj){
			if(obj[t]!=undefined)return "hash";
			else return "object";
		}}
	}else return (typeof obj);
}

a = [0,1,2,3,4,5];
document.write(typeof a);// object
document.write(classOf(a));// array

b = {"a":"A", "b":"B"};
document.write(typeof b);// object
document.write(classOf(b));// hash

javascript:(function(u){
var t;

/* YouTube */
if(u.match(/^http\:\/\/www.youtube.com\//)){
 t=encodeURI(document.title.replace(/^YouTube - /,'').replace(/ - YouTube$/,''));

/* NicoNico */
}else if(u.match(/^http\:\/\/www.nicovideo.jp\//)){
 t=encodeURI(document.title.replace(/ - ニコニコ動画\(.*?\)$/,''));
}

t=t.replace(/【.+?】/,'').replace('高音質','').replace('PV','').replace('MV','');
window.open('http://www.google.co.jp/search?q=%E6%AD%8C%E8%A9%9E goo '+t);
})(location.href);