diff --git a/phpBB/includes/functions.php b/phpBB/includes/functions.php
index 820a03fe64..79ea8978ee 100644
--- a/phpBB/includes/functions.php
+++ b/phpBB/includes/functions.php
@@ -4120,6 +4120,8 @@ function page_header($page_title = '', $display_online_list = true, $item_id = 0
 		'S_USER_UNREAD_PRIVMSG'			=> $user->data['user_unread_privmsg'],
 		'S_USER_NEW'					=> $user->data['user_new'],
 
+		'S_TAB_INDEX'		=> 1,
+
 		'SID'				=> $SID,
 		'_SID'				=> $_SID,
 		'SESSION_ID'		=> $user->session_id,
diff --git a/phpBB/styles/prosilver/template/captcha_default.html b/phpBB/styles/prosilver/template/captcha_default.html
index 0894445c8d..885a3f42af 100644
--- a/phpBB/styles/prosilver/template/captcha_default.html
+++ b/phpBB/styles/prosilver/template/captcha_default.html
@@ -11,7 +11,7 @@
 	<dl>
 		<dt><label for="confirm_code">{L_CONFIRM_CODE}:</label></dt>
 		<dd><img src="{CONFIRM_IMAGE_LINK}" alt="{L_CONFIRM_CODE}" /></dd>
-		<dd><input type="text" name="confirm_code" id="confirm_code" size="8" maxlength="8" tabindex="<!-- INC $TAB_INDEX -->" class="inputbox narrow" title="{L_CONFIRM_CODE}" />
+		<dd><input type="text" name="confirm_code" id="confirm_code" size="8" maxlength="8" tabindex="<!-- INC S_TAB_INDEX -->" class="inputbox narrow" title="{L_CONFIRM_CODE}" />
 		<!-- IF S_CONFIRM_REFRESH --><input type="submit" name="refresh_vc" id="refresh_vc" class="button2" value="{L_VC_REFRESH}" /><!-- ENDIF -->
 		<input type="hidden" name="confirm_id" id="confirm_id" value="{CONFIRM_ID}" /></dd>
 		<dd>{L_CONFIRM_CODE_EXPLAIN}</dd>
diff --git a/phpBB/styles/prosilver/template/captcha_qa.html b/phpBB/styles/prosilver/template/captcha_qa.html
index 093b91cdd7..2d5e69207a 100644
--- a/phpBB/styles/prosilver/template/captcha_qa.html
+++ b/phpBB/styles/prosilver/template/captcha_qa.html
@@ -9,7 +9,7 @@
 	<dl>
 	<dt><label>{QA_CONFIRM_QUESTION}</label>:<br /><span>{L_CONFIRM_QUESTION_EXPLAIN}</span></dt>
 	<dd>
-		<input type="text" tabindex="<!-- INC $TAB_INDEX -->" name="qa_answer" id="answer" size="45"  class="inputbox autowidth" title="{L_ANSWER}" />
+		<input type="text" tabindex="<!-- INC S_TAB_INDEX -->" name="qa_answer" id="answer" size="45"  class="inputbox autowidth" title="{L_ANSWER}" />
 		<input type="hidden" name="qa_confirm_id" id="qa_confirm_id" value="{QA_CONFIRM_ID}" />
 	</dd>
 	</dl>
diff --git a/phpBB/styles/prosilver/template/captcha_recaptcha.html b/phpBB/styles/prosilver/template/captcha_recaptcha.html
index 9ec1f7f5de..a77d19cfc1 100644
--- a/phpBB/styles/prosilver/template/captcha_recaptcha.html
+++ b/phpBB/styles/prosilver/template/captcha_recaptcha.html
@@ -17,7 +17,7 @@
 		// <![CDATA[
 		var RecaptchaOptions = {
 		   lang : {L_RECAPTCHA_LANG},
-		   tabindex : <!-- INC $TAB_INDEX -->
+		   tabindex : <!-- INC S_TAB_INDEX -->
 		};
 		// ]]>
 		</script>
diff --git a/phpBB/styles/prosilver/template/index_body.html b/phpBB/styles/prosilver/template/index_body.html
index 9cb4d2067d..3ed8724361 100644
--- a/phpBB/styles/prosilver/template/index_body.html
+++ b/phpBB/styles/prosilver/template/index_body.html
@@ -18,7 +18,7 @@
 	<form method="post" action="{S_LOGIN_ACTION}" class="headerspace">
 	<h3><a href="{U_LOGIN_LOGOUT}">{L_LOGIN_LOGOUT}</a><!-- IF S_REGISTER_ENABLED -->&nbsp; &bull; &nbsp;<a href="{U_REGISTER}">{L_REGISTER}</a><!-- ENDIF --></h3>
 		<fieldset class="quick-login">
-			<label for="username">{L_USERNAME}:</label>&nbsp;<input type="text" name="username" id="username" size="10" class="inputbox" title="{L_USERNAME}" />  
+			<label for="username">{L_USERNAME}:</label>&nbsp;<input type="text" name="username" id="username" size="10" class="inputbox" title="{L_USERNAME}" />
 			<label for="password">{L_PASSWORD}:</label>&nbsp;<input type="password" name="password" id="password" size="10" class="inputbox" title="{L_PASSWORD}" />
 			<!-- IF S_AUTOLOGIN_ENABLED -->
 				| <label for="autologin">{L_LOG_ME_IN} <input type="checkbox" name="autologin" id="autologin" /></label>
diff --git a/phpBB/styles/prosilver/template/login_body.html b/phpBB/styles/prosilver/template/login_body.html
index b81a673406..fc52deba72 100644
--- a/phpBB/styles/prosilver/template/login_body.html
+++ b/phpBB/styles/prosilver/template/login_body.html
@@ -6,16 +6,16 @@
 
 	<div class="content">
 		<h2><!-- IF LOGIN_EXPLAIN -->{LOGIN_EXPLAIN}<!-- ELSE -->{L_LOGIN}<!-- ENDIF --></h2>
-		
+
 		<fieldset <!-- IF not S_CONFIRM_CODE -->class="fields1"<!-- ELSE -->class="fields2"<!-- ENDIF -->>
 		<!-- IF LOGIN_ERROR --><div class="error">{LOGIN_ERROR}</div><!-- ENDIF -->
 		<dl>
 			<dt><label for="{USERNAME_CREDENTIAL}">{L_USERNAME}:</label></dt>
-			<dd><input type="text" tabindex="<!-- INC $TAB_INDEX -->" name="{USERNAME_CREDENTIAL}" id="{USERNAME_CREDENTIAL}" size="25" value="{USERNAME}" class="inputbox autowidth" /></dd>
+			<dd><input type="text" tabindex="<!-- INC S_TAB_INDEX -->" name="{USERNAME_CREDENTIAL}" id="{USERNAME_CREDENTIAL}" size="25" value="{USERNAME}" class="inputbox autowidth" /></dd>
 		</dl>
 		<dl>
 			<dt><label for="{PASSWORD_CREDENTIAL}">{L_PASSWORD}:</label></dt>
-			<dd><input type="password" tabindex="<!-- INC $TAB_INDEX -->" id="{PASSWORD_CREDENTIAL}" name="{PASSWORD_CREDENTIAL}" size="25" class="inputbox autowidth" /></dd>
+			<dd><input type="password" tabindex="<!-- INC S_TAB_INDEX -->" id="{PASSWORD_CREDENTIAL}" name="{PASSWORD_CREDENTIAL}" size="25" class="inputbox autowidth" /></dd>
 			<!-- IF S_DISPLAY_FULL_LOGIN and (U_SEND_PASSWORD or U_RESEND_ACTIVATION) -->
 				<!-- IF U_SEND_PASSWORD --><dd><a href="{U_SEND_PASSWORD}">{L_FORGOT_PASS}</a></dd><!-- ENDIF -->
 				<!-- IF U_RESEND_ACTIVATION --><dd><a href="{U_RESEND_ACTIVATION}">{L_RESEND_ACTIVATION}</a></dd><!-- ENDIF -->
@@ -26,16 +26,16 @@
 		<!-- ENDIF -->
 		<!-- IF S_DISPLAY_FULL_LOGIN -->
 		<dl>
-			<!-- IF S_AUTOLOGIN_ENABLED --><dd><label for="autologin"><input type="checkbox" name="autologin" id="autologin" tabindex="<!-- INC $TAB_INDEX -->" /> {L_LOG_ME_IN}</label></dd><!-- ENDIF -->
-			<dd><label for="viewonline"><input type="checkbox" name="viewonline" id="viewonline" tabindex="<!-- INC $TAB_INDEX -->" /> {L_HIDE_ME}</label></dd>
+			<!-- IF S_AUTOLOGIN_ENABLED --><dd><label for="autologin"><input type="checkbox" name="autologin" id="autologin" tabindex="<!-- INC S_TAB_INDEX -->" /> {L_LOG_ME_IN}</label></dd><!-- ENDIF -->
+			<dd><label for="viewonline"><input type="checkbox" name="viewonline" id="viewonline" tabindex="<!-- INC S_TAB_INDEX -->" /> {L_HIDE_ME}</label></dd>
 		</dl>
 		<!-- ENDIF -->
 
 		<dl>
 			<dt>&nbsp;</dt>
-			<dd>{S_HIDDEN_FIELDS}<input type="submit" name="login" tabindex="<!-- INC $TAB_INDEX -->" value="{L_LOGIN}" class="button1" /></dd>
+			<dd>{S_HIDDEN_FIELDS}<input type="submit" name="login" tabindex="<!-- INC S_TAB_INDEX -->" value="{L_LOGIN}" class="button1" /></dd>
 		</dl>
-	
+
 		</fieldset>
 	</div>
 	<span class="corners-bottom"><span></span></span></div>
diff --git a/phpBB/styles/prosilver/template/overall_header.html b/phpBB/styles/prosilver/template/overall_header.html
index a9f89b7e54..f9f9dcfdff 100644
--- a/phpBB/styles/prosilver/template/overall_header.html
+++ b/phpBB/styles/prosilver/template/overall_header.html
@@ -97,7 +97,7 @@
 <!-- IF S_CONTENT_DIRECTION eq 'rtl' -->
 	<link href="{T_THEME_PATH}/bidi.css" rel="stylesheet" type="text/css" media="screen, projection" />
 <!-- ENDIF -->
-<!-- DEFINE $TAB_INDEX = 1 -->
+
 </head>
 
 <body id="phpbb" class="section-{SCRIPT_NAME} {S_CONTENT_DIRECTION}">
diff --git a/phpBB/styles/prosilver/template/posting_editor.html b/phpBB/styles/prosilver/template/posting_editor.html
index 11a8d2baa3..c349003c38 100644
--- a/phpBB/styles/prosilver/template/posting_editor.html
+++ b/phpBB/styles/prosilver/template/posting_editor.html
@@ -90,14 +90,14 @@
 	<!-- IF not S_PRIVMSGS and S_DISPLAY_USERNAME -->
 	<dl style="clear: left;">
 		<dt><label for="username">{L_USERNAME}:</label></dt>
-		<dd><input type="text" tabindex="<!-- INC $TAB_INDEX -->"  name="username" id="username" size="25" value="{USERNAME}" class="inputbox autowidth" /></dd>
+		<dd><input type="text" tabindex="<!-- INC S_TAB_INDEX -->"  name="username" id="username" size="25" value="{USERNAME}" class="inputbox autowidth" /></dd>
 	</dl>
 	<!-- ENDIF -->
 
 	<!-- IF S_POST_ACTION or S_PRIVMSGS or S_EDIT_DRAFT -->
 	<dl style="clear: left;">
 		<dt><label for="subject">{L_SUBJECT}:</label></dt>
-		<dd><input type="text" name="subject" id="subject" size="45" maxlength="<!-- IF S_NEW_MESSAGE -->60<!-- ELSE -->64<!-- ENDIF -->" tabindex="<!-- INC $TAB_INDEX -->" value="{SUBJECT}{DRAFT_SUBJECT}" class="inputbox autowidth" /></dd>
+		<dd><input type="text" name="subject" id="subject" size="45" maxlength="<!-- IF S_NEW_MESSAGE -->60<!-- ELSE -->64<!-- ENDIF -->" tabindex="<!-- INC S_TAB_INDEX -->" value="{SUBJECT}{DRAFT_SUBJECT}" class="inputbox autowidth" /></dd>
 	</dl>
 		<!-- IF CAPTCHA_TEMPLATE and S_CONFIRM_CODE -->
 		<!-- INCLUDE {CAPTCHA_TEMPLATE} -->
@@ -135,7 +135,7 @@
 	</div>
 
 	<div id="message-box">
-		<textarea <!-- IF S_UCP_ACTION and not S_PRIVMSGS and not S_EDIT_DRAFT -->name="signature" id="signature" style="height: 9em;"<!-- ELSE -->name="message" id="message"<!-- ENDIF --> rows="15" cols="76" tabindex="<!-- INC $TAB_INDEX -->" onselect="storeCaret(this);" onclick="storeCaret(this);" onkeyup="storeCaret(this);" onfocus="initInsertions();" class="inputbox">{MESSAGE}{DRAFT_MESSAGE}{SIGNATURE}</textarea>
+		<textarea <!-- IF S_UCP_ACTION and not S_PRIVMSGS and not S_EDIT_DRAFT -->name="signature" id="signature" style="height: 9em;"<!-- ELSE -->name="message" id="message"<!-- ENDIF --> rows="15" cols="76" tabindex="<!-- INC S_TAB_INDEX -->" onselect="storeCaret(this);" onclick="storeCaret(this);" onkeyup="storeCaret(this);" onfocus="initInsertions();" class="inputbox">{MESSAGE}{DRAFT_MESSAGE}{SIGNATURE}</textarea>
 	</div>
 </fieldset>
 
@@ -180,10 +180,10 @@
 		<fieldset class="submit-buttons">
 			{S_HIDDEN_ADDRESS_FIELD}
 			{S_HIDDEN_FIELDS}
-			<!-- IF S_HAS_DRAFTS --><input type="submit" accesskey="d" tabindex="<!-- INC $TAB_INDEX -->" name="load" value="{L_LOAD}" class="button2" onclick="load_draft = true;" />&nbsp; <!-- ENDIF -->
-			<!-- IF S_SAVE_ALLOWED --><input type="submit" accesskey="k" tabindex="<!-- INC $TAB_INDEX -->" name="save" value="{L_SAVE}" class="button2" />&nbsp; <!-- ENDIF -->
-			<input type="submit" tabindex="<!-- INC $TAB_INDEX -->" name="preview" value="{L_PREVIEW}" class="button1"<!-- IF not S_PRIVMSGS --> onclick="document.getElementById('postform').action += '#preview';"<!-- ENDIF --> />&nbsp;
-			<input type="submit" accesskey="s" tabindex="<!-- INC $TAB_INDEX -->" name="post" value="{L_SUBMIT}" class="button1" />&nbsp;
+			<!-- IF S_HAS_DRAFTS --><input type="submit" accesskey="d" tabindex="<!-- INC S_TAB_INDEX -->" name="load" value="{L_LOAD}" class="button2" onclick="load_draft = true;" />&nbsp; <!-- ENDIF -->
+			<!-- IF S_SAVE_ALLOWED --><input type="submit" accesskey="k" tabindex="<!-- INC S_TAB_INDEX -->" name="save" value="{L_SAVE}" class="button2" />&nbsp; <!-- ENDIF -->
+			<input type="submit" tabindex="<!-- INC S_TAB_INDEX -->" name="preview" value="{L_PREVIEW}" class="button1"<!-- IF not S_PRIVMSGS --> onclick="document.getElementById('postform').action += '#preview';"<!-- ENDIF --> />&nbsp;
+			<input type="submit" accesskey="s" tabindex="<!-- INC S_TAB_INDEX -->" name="post" value="{L_SUBMIT}" class="button1" />&nbsp;
 
 		</fieldset>
 
diff --git a/phpBB/styles/prosilver/template/ucp_register.html b/phpBB/styles/prosilver/template/ucp_register.html
index 0962551aa4..f83d75da76 100644
--- a/phpBB/styles/prosilver/template/ucp_register.html
+++ b/phpBB/styles/prosilver/template/ucp_register.html
@@ -26,38 +26,36 @@
 	<!-- IF L_REG_COND -->
 		<dl><dd><strong>{L_REG_COND}</strong></dd></dl>
 	<!-- ENDIF -->
-<!-- DEFINE $TAB_INDEX = 1 -->
-
 	<dl>
 		<dt><label for="username">{L_USERNAME}:</label><br /><span>{L_USERNAME_EXPLAIN}</span></dt>
-		<dd><input type="text" tabindex="<!-- INC $TAB_INDEX -->" name="username" id="username" size="25" value="{USERNAME}" class="inputbox autowidth" title="{L_USERNAME}" /></dd>
+		<dd><input type="text" tabindex="<!-- INC S_TAB_INDEX -->" name="username" id="username" size="25" value="{USERNAME}" class="inputbox autowidth" title="{L_USERNAME}" /></dd>
 	</dl>
 	<dl>
 		<dt><label for="email">{L_EMAIL_ADDRESS}:</label></dt>
-		<dd><input type="text" tabindex="<!-- INC $TAB_INDEX -->" name="email" id="email" size="25" maxlength="100" value="{EMAIL}" class="inputbox autowidth" title="{L_EMAIL_ADDRESS}" /></dd>
+		<dd><input type="text" tabindex="<!-- INC S_TAB_INDEX -->" name="email" id="email" size="25" maxlength="100" value="{EMAIL}" class="inputbox autowidth" title="{L_EMAIL_ADDRESS}" /></dd>
 	</dl>
 	<dl>
 		<dt><label for="email_confirm">{L_CONFIRM_EMAIL}:</label></dt>
-		<dd><input type="text" tabindex="<!-- INC $TAB_INDEX -->" name="email_confirm" id="email_confirm" size="25" maxlength="100" value="{EMAIL_CONFIRM}" class="inputbox autowidth" title="{L_CONFIRM_EMAIL}" /></dd>
+		<dd><input type="text" tabindex="<!-- INC S_TAB_INDEX -->" name="email_confirm" id="email_confirm" size="25" maxlength="100" value="{EMAIL_CONFIRM}" class="inputbox autowidth" title="{L_CONFIRM_EMAIL}" /></dd>
 	</dl>
 	<dl>
 		<dt><label for="new_password">{L_PASSWORD}:</label><br /><span>{L_PASSWORD_EXPLAIN}</span></dt>
-		<dd><input type="password" tabindex="<!-- INC $TAB_INDEX -->" name="new_password" id="new_password" size="25" value="{PASSWORD}" class="inputbox autowidth" title="{L_NEW_PASSWORD}" /></dd>
+		<dd><input type="password" tabindex="<!-- INC S_TAB_INDEX -->" name="new_password" id="new_password" size="25" value="{PASSWORD}" class="inputbox autowidth" title="{L_NEW_PASSWORD}" /></dd>
 	</dl>
 	<dl>
 		<dt><label for="password_confirm">{L_CONFIRM_PASSWORD}:</label></dt>
-		<dd><input type="password"  tabindex="<!-- INC $TAB_INDEX -->" name="password_confirm" id="password_confirm" size="25" value="{PASSWORD_CONFIRM}" class="inputbox autowidth" title="{L_CONFIRM_PASSWORD}" /></dd>
+		<dd><input type="password"  tabindex="<!-- INC S_TAB_INDEX -->" name="password_confirm" id="password_confirm" size="25" value="{PASSWORD_CONFIRM}" class="inputbox autowidth" title="{L_CONFIRM_PASSWORD}" /></dd>
 	</dl>
 
 	<hr />
 
 	<dl>
 		<dt><label for="lang">{L_LANGUAGE}:</label></dt>
-		<dd><select name="lang" id="lang" onchange="change_language(this.value); return false;" tabindex="<!-- INC $TAB_INDEX -->" title="{L_LANGUAGE}">{S_LANG_OPTIONS}</select></dd>
+		<dd><select name="lang" id="lang" onchange="change_language(this.value); return false;" tabindex="<!-- INC S_TAB_INDEX -->" title="{L_LANGUAGE}">{S_LANG_OPTIONS}</select></dd>
 	</dl>
 	<dl>
 		<dt><label for="tz">{L_TIMEZONE}:</label></dt>
-		<dd><select name="tz" id="tz" tabindex="<!-- INC $TAB_INDEX -->" class="autowidth">{S_TZ_OPTIONS}</select></dd>
+		<dd><select name="tz" id="tz" tabindex="<!-- INC S_TAB_INDEX -->" class="autowidth">{S_TZ_OPTIONS}</select></dd>
 	</dl>
 
 	<!-- IF .profile_fields -->
@@ -79,7 +77,7 @@
 <!-- IF CAPTCHA_TEMPLATE -->
 
 		<!-- INCLUDE {CAPTCHA_TEMPLATE} -->
-	
+
 <!-- ENDIF -->
 <!-- IF S_COPPA -->