diff --git a/index.php.template.txt b/index.php.template.txt
index 4db1a2d95..3faee9be2 100644
--- a/index.php.template.txt
+++ b/index.php.template.txt
@@ -187,7 +187,7 @@ if (!$psim) {
 		<![endif]-->
 
 		<div id="simheader">
-			<h1 style="margin-top:2px;margin-right:10em;padding-top:0;"><img src="/pokemonshowdownbeta.png" alt="Pokemon Showdown! (beta)" /></h1>
+			<h1 style="margin-top:2px;margin-right:10em;padding-top:0;"><img src="http://play.pokemonshowdown.com/pokemonshowdownbeta.png" alt="Pokemon Showdown! (beta)" /></h1>
 		</div>
 		<div id="leftbarbg"><div><span></span></div></div>
 		<div id="leftbar">
diff --git a/js/battle.js b/js/battle.js
index a643d2e07..a1e9c7952 100644
--- a/js/battle.js
+++ b/js/battle.js
@@ -133,7 +133,7 @@ function Pokemon(species) {
 		if (selfP.hasVolatile(volatile)) return;
 		selfP.volatiles[volatile] = [volatile, null];
 		if (volatile === 'leechseed') {
-			selfP.side.battle.spriteElemsFront[selfP.side.n].append('<img src="/fx/energyball.png" style="display:none;position:absolute" />');
+			selfP.side.battle.spriteElemsFront[selfP.side.n].append('<img src="' + Tools.resourcePrefix + 'fx/energyball.png" style="display:none;position:absolute" />');
 			var curelem = selfP.side.battle.spriteElemsFront[selfP.side.n].children().last();
 			curelem.css(self.pos({
 				display: 'block',
@@ -145,7 +145,7 @@ function Pokemon(species) {
 			}, BattleEffects.energyball));
 			var elem = curelem;
 
-			selfP.side.battle.spriteElemsFront[selfP.side.n].append('<img src="/fx/energyball.png" style="display:none;position:absolute" />');
+			selfP.side.battle.spriteElemsFront[selfP.side.n].append('<img src="' + Tools.resourcePrefix + 'fx/energyball.png" style="display:none;position:absolute" />');
 			curelem = selfP.side.battle.spriteElemsFront[selfP.side.n].children().last();
 			curelem.css(self.pos({
 				display: 'block',
@@ -157,7 +157,7 @@ function Pokemon(species) {
 			}, BattleEffects.energyball));
 			elem = elem.add(curelem);
 
-			selfP.side.battle.spriteElemsFront[selfP.side.n].append('<img src="/fx/energyball.png" style="display:none;position:absolute" />');
+			selfP.side.battle.spriteElemsFront[selfP.side.n].append('<img src="' + Tools.resourcePrefix + 'fx/energyball.png" style="display:none;position:absolute" />');
 			curelem = selfP.side.battle.spriteElemsFront[selfP.side.n].children().last();
 			curelem.css(self.pos({
 				display: 'block',
@@ -4799,13 +4799,13 @@ function Battle(frame, logFrame, noPreload) {
 		for (i in BattleEffects) {
 			if (BattleEffects[i].url) self.preloadImage(BattleEffects[i].url);
 		}
-		self.preloadImage('/fx/weather-raindance.jpg'); // rain is used often enough to precache
-		self.preloadImage('/sprites/bw/substitute.png');
-		self.preloadImage('/sprites/bw-back/substitute.png');
-		//self.preloadImage('/fx/bg.jpg');
+		self.preloadImage(Tools.resourcePrefix + 'fx/weather-raindance.jpg'); // rain is used often enough to precache
+		self.preloadImage(Tools.resourcePrefix + 'sprites/bw/substitute.png');
+		self.preloadImage(Tools.resourcePrefix + 'sprites/bw-back/substitute.png');
+		//self.preloadImage(Tools.resourcePrefix + 'fx/bg.jpg');
 	};
 	this.preloadSounds = function () {
-		//self.preloadAudio('audio/bw-trainer-battle.mp3');
+		//self.preloadAudio(Tools.resourcePrefix + 'audio/bw-trainer-battle.mp3');
 	}
 	this.preloadAudio = function (url, autoplay) {
 		if (noPreload) return;
@@ -4845,29 +4845,29 @@ function Battle(frame, logFrame, noPreload) {
 			if (window.forceBgm) bgmNum = window.forceBgm;
 			switch (bgmNum) {
 			case -1:
-				self.preloadBgm('/audio/bw2-homika-dogars.mp3', true, 1661, 68131);
+				self.preloadBgm(Tools.resourcePrefix + 'audio/bw2-homika-dogars.mp3', true, 1661, 68131);
 				break;
 			case 0:
-				self.preloadBgm('/audio/hgss-kanto-trainer.mp3', true, 13003, 94656);
+				self.preloadBgm(Tools.resourcePrefix + 'audio/hgss-kanto-trainer.mp3', true, 13003, 94656);
 				break;
 			case 1:
-				self.preloadBgm('/audio/bw-subway-trainer.mp3', true, 15503, 110984);
+				self.preloadBgm(Tools.resourcePrefix + 'audio/bw-subway-trainer.mp3', true, 15503, 110984);
 				break;
 			case 2:
-				self.preloadBgm('/audio/bw-trainer.mp3', true, 14629, 110109);
+				self.preloadBgm(Tools.resourcePrefix + 'audio/bw-trainer.mp3', true, 14629, 110109);
 				break;
 			case 3:
-				self.preloadBgm('/audio/bw-rival.mp3', true, 19180, 57373);
+				self.preloadBgm(Tools.resourcePrefix + 'audio/bw-rival.mp3', true, 19180, 57373);
 				break;
 			case 4:
-				self.preloadBgm('/audio/dpp-trainer.mp3', true, 13440, 96959);
+				self.preloadBgm(Tools.resourcePrefix + 'audio/dpp-trainer.mp3', true, 13440, 96959);
 				break;
 			case 5:
-				self.preloadBgm('/audio/hgss-johto-trainer.mp3', true, 23731, 125086);
+				self.preloadBgm(Tools.resourcePrefix + 'audio/hgss-johto-trainer.mp3', true, 23731, 125086);
 				break;
 			case 6:
 			default:
-				self.preloadBgm('/audio/dpp-rival.mp3', true, 13888, 66352);
+				self.preloadBgm(Tools.resourcePrefix + 'audio/dpp-rival.mp3', true, 13888, 66352);
 				break;
 			}
 			return;
diff --git a/js/battledata.js b/js/battledata.js
index 2b1b4d169..f37c85309 100644
--- a/js/battledata.js
+++ b/js/battledata.js
@@ -306,6 +306,8 @@ var basespecieschart = {
 
 var Tools = {
 
+	resourcePrefix: 'http://play.pokemonshowdown.com/',
+
 	showInterstice: (function() {
 		var patterns = (function(whitelist) {
 			var patterns = [];
@@ -596,11 +598,11 @@ var Tools = {
 			var num = '' + BattlePokemonSprites[pokemon.speciesid].num;
 			if (num.length < 3) num = '0' + num;
 			if (num.length < 3) num = '0' + num;
-			cryurl = '/audio/cries/' + num + '.wav';
+			cryurl = Tools.resourcePrefix + 'audio/cries/' + num + '.wav';
 		}
 		if (pokemon.shiny) back += '-shiny';
 		if (window.BattlePokemonSprites && BattlePokemonSprites[pokemon.speciesid] && BattlePokemonSprites[pokemon.speciesid][facing]) {
-			var url = '/sprites/bwani'+back;
+			var url = Tools.resourcePrefix + 'sprites/bwani'+back;
 			url += '/'+spriteid;
 			var spriteType = 'ani';
 			if (BattlePokemonSprites[pokemon.speciesid][facing]['anif'] && pokemon.gender === 'F') {
@@ -620,7 +622,7 @@ var Tools = {
 		return {
 			w: 96,
 			h: 96,
-			url: '/sprites/bw'+back+'/' + spriteid + '.png',
+			url: Tools.resourcePrefix + 'sprites/bw'+back+'/' + spriteid + '.png',
 			cryurl: cryurl,
 			isBackSprite: isBack
 		};
@@ -629,11 +631,11 @@ var Tools = {
 	getIcon: function(pokemon) {
 		var num = 0;
 		if (pokemon === 'pokeball') {
-			return 'background:transparent url(/sprites/bwicons-pokeball-sheet.png) no-repeat scroll -0px -8px';
+			return 'background:transparent url(' + Tools.resourcePrefix + 'sprites/bwicons-pokeball-sheet.png) no-repeat scroll -0px -8px';
 		} else if (pokemon === 'pokeball-statused') {
-			return 'background:transparent url(/sprites/bwicons-pokeball-sheet.png) no-repeat scroll -32px -8px';
+			return 'background:transparent url(' + Tools.resourcePrefix + 'sprites/bwicons-pokeball-sheet.png) no-repeat scroll -32px -8px';
 		} else if (pokemon === 'pokeball-none') {
-			return 'background:transparent url(/sprites/bwicons-pokeball-sheet.png) no-repeat scroll -64px -8px';
+			return 'background:transparent url(' + Tools.resourcePrefix + 'sprites/bwicons-pokeball-sheet.png) no-repeat scroll -64px -8px';
 		}
 		var id = toId(pokemon);
 		if (pokemon && pokemon.species) id = toId(pokemon.species);
@@ -696,7 +698,7 @@ var Tools = {
 		var top = 8 + Math.floor(num / 16) * 32;
 		var left = (num % 16) * 32;
 		var fainted = (pokemon && pokemon.fainted?';opacity:.4':'');
-		return 'background:transparent url(/sprites/bwicons-sheet.png?v0.7.18) no-repeat scroll -' + left + 'px -' + top + 'px' + fainted;
+		return 'background:transparent url(' + Tools.resourcePrefix + 'sprites/bwicons-sheet.png?v0.7.18) no-repeat scroll -' + left + 'px -' + top + 'px' + fainted;
 	},
 
 	getTeambuilderSprite: function(pokemon) {
@@ -715,7 +717,7 @@ var Tools = {
 		if (BattlePokemonSprites && BattlePokemonSprites[id] && BattlePokemonSprites[id].front && BattlePokemonSprites[id].front.anif && pokemon.gender === 'F') {
 			id+='-f';
 		}
-		return 'background-image:url(/sprites/bw'+shiny+'/'+id+'.png)';
+		return 'background-image:url(' + Tools.resourcePrefix + 'sprites/bw'+shiny+'/'+id+'.png)';
 	},
 
 	getItemIcon: function(item) {
@@ -725,12 +727,12 @@ var Tools = {
 
 		var top = Math.floor(num / 16) * 24;
 		var left = (num % 16) * 24;
-		return 'background:transparent url(/sprites/itemicons-sheet.png) no-repeat scroll -' + left + 'px -' + top + 'px';
+		return 'background:transparent url(' + Tools.resourcePrefix + 'sprites/itemicons-sheet.png) no-repeat scroll -' + left + 'px -' + top + 'px';
 	},
 
 	getTypeIcon: function(type, b) { // b is just for utilichart.js
 		sanitizedType = type.replace(/\?/g,'%3f');
-		return '<img src="/sprites/types/'+sanitizedType+'.png" alt="'+type+'" height="14" width="32"'+(b?' class="b"':'')+' />';
+		return '<img src="' + Tools.resourcePrefix + 'sprites/types/'+sanitizedType+'.png" alt="'+type+'" height="14" width="32"'+(b?' class="b"':'')+' />';
 	}
 };
 
diff --git a/js/sim.js b/js/sim.js
index e5c9520ad..5ae322df1 100644
--- a/js/sim.js
+++ b/js/sim.js
@@ -1812,7 +1812,7 @@ function Lobby(id, elem) {
 				roomListCode += '<div><a href="' + locPrefix + '' + id + '" onclick="selectTab(\'' + id + '\');return false">' + roomDesc + '</a></div>';
 			}
 
-			var code = '<img src="/sprites/trainers/' + data.avatar + '.png" />';
+			var code = '<img src="' + Tools.resourcePrefix + 'sprites/trainers/' + data.avatar + '.png" />';
 			if (roomListCode) {
 				roomListCode = '<div class="action-form">In rooms:<br /><div class="roomlist">' + roomListCode + '</div></div>';
 			}
@@ -2661,7 +2661,7 @@ function showTooltip(thing, type, elem, ownHeight, isActive) {
 		if (!accuracy || accuracy === true) accuracy = '&mdash;';
 		else accuracy = '' + accuracy + '%';
 		text = '<div class="tooltipinner"><div class="tooltip">';
-		text += '<h2>' + move.name + '<br />'+Tools.getTypeIcon(move.type)+' <img src="/sprites/categories/' + move.category + '.png" alt="' + move.category + '" /></h2>';
+		text += '<h2>' + move.name + '<br />'+Tools.getTypeIcon(move.type)+' <img src="' + Tools.resourcePrefix + 'sprites/categories/' + move.category + '.png" alt="' + move.category + '" /></h2>';
 		text += '<p>Base power: ' + basePower + '</p>';
 		text += '<p>Accuracy: ' + accuracy + '</p>';
 		if (move.desc) {
@@ -2879,7 +2879,7 @@ var favicon = {
 			return false;
 		};
 		dismissNotify = function () {
-			favicon.change('/favicon.ico');
+			favicon.change(Tools.resourcePrefix + 'favicon.ico');
 			if (activeNotification) {
 				activeNotification.cancel();
 				activeNotification = null;
@@ -2888,7 +2888,7 @@ var favicon = {
 		};
 		notify = function (data) {
 			if (window.focused) return;
-			favicon.animate(['/favicon-notify.ico', '/favicon-notify2.ico']);
+			favicon.animate([Tools.resourcePrefix + 'favicon-notify.ico', Tools.resourcePrefix + 'favicon-notify2.ico']);
 			if (needEnableNotify()) {
 				requestNotify();
 			} else {
@@ -3062,7 +3062,7 @@ function overlay(overlayType, data) {
 		contents += '<p><label class="label">Username:</label> ' + (data.name || me.name) + '<input type="hidden" id="overlay_username" value="' + sanitize(data.name || me.name) + '" /></p>';
 		contents += '<p><label class="label">Password:</label> <input class="textbox" type="password" id="overlay_password" /></p>';
 		contents += '<p><label class="label">Password (confirm):</label> <input class="textbox" type="password" id="overlay_cpassword" /></p>';
-		contents += '<p><img src="/sprites/bwani/pikachu.gif" /></p>';
+		contents += '<p><img src="' + Tools.resourcePrefix + 'sprites/bwani/pikachu.gif" /></p>';
 		contents += '<p><label class="label">What is this pokemon?</label> <input class="textbox" type="text" id="overlay_captcha" value="' + sanitize(data.captcha) + '" /></p>';
 		contents += '<p><button type="submit"><strong>Register</strong></button> <button onclick="overlayClose();return false">Cancel</button></p>';
 		selectElem = '#overlay_password';
diff --git a/js/utilichart.js b/js/utilichart.js
index 1767f4b04..0071fa174 100644
--- a/js/utilichart.js
+++ b/js/utilichart.js
@@ -243,7 +243,7 @@ function BattleChart()
 		
 		text += '<span class="col typecol">';
 		text += Tools.getTypeIcon(move.type, match.type);
-		text += '<img src="/sprites/categories/'+move.category+'.png" alt="'+move.category+'" height="14" width="32"'+(match.category?' class="b"':'')+' />';
+		text += '<img src="' + Tools.resourcePrefix + 'sprites/categories/'+move.category+'.png" alt="'+move.category+'" height="14" width="32"'+(match.category?' class="b"':'')+' />';
 		text += '</span> ';
 		
 		text += '<span class="col labelcol">'+(move.category!=='Status'?('<em>Power</em><br />'+(move.basePower||'&mdash;')):'')+'</span> ';
diff --git a/style/sim.css b/style/sim.css
index 4443cfbbd..4c7f3a1d1 100644
--- a/style/sim.css
+++ b/style/sim.css
@@ -553,7 +553,7 @@ button.closebutton i
 	cursor: pointer;
 	width: 15px;
 	height: 15px;
-	background: transparent url(/fx/closebuttonsheet.png) no-repeat scroll 0px -16px;
+	background: transparent url(http://play.pokemonshowdown.com/fx/closebuttonsheet.png) no-repeat scroll 0px -16px;
 	z-index: 10;
 }
 #leftbar div .close2
@@ -570,7 +570,7 @@ button.closebutton i
 }
 #leftbar div .close:hover
 {
-	background: transparent url(/fx/closebuttonsheet.png) no-repeat scroll 0px 0px;
+	background: transparent url(http://play.pokemonshowdown.com/fx/closebuttonsheet.png) no-repeat scroll 0px 0px;
 }
 #leftbar small
 {
@@ -652,7 +652,7 @@ button.closebutton i
 	border-right: 0;
 	height: auto;
 	width: auto;
-	background: #edf1f4 url(/data/meloettabg.png) no-repeat scroll right bottom;
+	background: #edf1f4 url(http://play.pokemonshowdown.com/data/meloettabg.png) no-repeat scroll right bottom;
 	word-wrap: break-word;
 	overflow-x: hidden;
 }