diff --git a/pmd_common.php b/pmd_common.php
index a1e30979f..75146c30e 100644
--- a/pmd_common.php
+++ b/pmd_common.php
@@ -18,54 +18,79 @@ $GLOBALS['PMD']['STYLE']          = 'default';
 require_once './libraries/relation.lib.php';
 $cfgRelation = PMA_getRelationsParam();
 
-$script_display_field = "<script>\n var display_field = new Array();\n";
+$GLOBALS['script_display_field'] = "<script>\n var display_field = new Array();\n";
 
-function get_tabs() // PMA_DBI
+/**
+ * retrieves table info and stores it in $GLOBALS['PMD']
+ *
+ * @uses    $GLOBALS['script_display_field']
+ * @uses    $GLOBALS['PMD'] to fill it
+ * @uses    $GLOBALS['db']
+ * @uses    PMA_DBI_get_tables_full()
+ * @uses    PMA_DBI_select_db()
+ * @uses    PMA_getDisplayField()
+ * @uses    urlencode()
+ * @uses    htmlspecialchars()
+ * @uses    strtoupper()
+ * @uses    urlencode()
+ */
+function get_tabs()
 {
-    global $db, $script_display_field;
     $GLOBALS['PMD']['TABLE_NAME'] = array();// that foreach no error
     $GLOBALS['PMD']['OWNER'] = array();
     $GLOBALS['PMD']['TABLE_NAME_SMALL'] = array();
 
-    $tables = PMA_DBI_get_tables_full($db);
+    $tables = PMA_DBI_get_tables_full($GLOBALS['db']);
     // seems to be needed later
-    PMA_DBI_select_db($db);
+    PMA_DBI_select_db($GLOBALS['db']);
     $i = 0;
     foreach ($tables as $one_table) {
-        $GLOBALS['PMD']['TABLE_NAME'][$i] = $db . "." . $one_table['TABLE_NAME'];
-        $GLOBALS['PMD']['OWNER'][$i] = $db;
+        $GLOBALS['PMD']['TABLE_NAME'][$i] = $GLOBALS['db'] . "." . $one_table['TABLE_NAME'];
+        $GLOBALS['PMD']['OWNER'][$i] = $GLOBALS['db'];
         $GLOBALS['PMD']['TABLE_NAME_SMALL'][$i] = $one_table['TABLE_NAME'];
 
-        $GLOBALS['PMD_URL']['TABLE_NAME'][$i] = urlencode($db . "." . $one_table['TABLE_NAME']);
-        $GLOBALS['PMD_URL']['OWNER'][$i] = urlencode($db);
+        $GLOBALS['PMD_URL']['TABLE_NAME'][$i] = urlencode($GLOBALS['db'] . "." . $one_table['TABLE_NAME']);
+        $GLOBALS['PMD_URL']['OWNER'][$i] = urlencode($GLOBALS['db']);
         $GLOBALS['PMD_URL']['TABLE_NAME_SMALL'][$i] = urlencode($one_table['TABLE_NAME']);
 
-        $GLOBALS['PMD_OUT']['TABLE_NAME'][$i] = htmlspecialchars($db . "." . $one_table['TABLE_NAME'], ENT_QUOTES);
-        $GLOBALS['PMD_OUT']['OWNER'][$i] = htmlspecialchars($db, ENT_QUOTES);
+        $GLOBALS['PMD_OUT']['TABLE_NAME'][$i] = htmlspecialchars($GLOBALS['db'] . "." . $one_table['TABLE_NAME'], ENT_QUOTES);
+        $GLOBALS['PMD_OUT']['OWNER'][$i] = htmlspecialchars($GLOBALS['db'], ENT_QUOTES);
         $GLOBALS['PMD_OUT']['TABLE_NAME_SMALL'][$i] = htmlspecialchars($one_table['TABLE_NAME'], ENT_QUOTES);
 
         $GLOBALS['PMD']['TABLE_TYPE'][$i] = strtoupper($one_table['ENGINE']);
 
-        $DF = PMA_getDisplayField($db, $one_table['TABLE_NAME']);
-        if($DF!='')
-        $script_display_field .= "  display_field['" . $GLOBALS['PMD_URL']["TABLE_NAME_SMALL"][$i] . "'] = '" . urlencode($DF) . "';\n";
+        $DF = PMA_getDisplayField($GLOBALS['db'], $one_table['TABLE_NAME']);
+        if ($DF != '') {
+            $GLOBALS['script_display_field'] .= "  display_field['"
+                . $GLOBALS['PMD_URL']["TABLE_NAME_SMALL"][$i] . "'] = '"
+                . urlencode($DF) . "';\n";
+        }
 
         $i++;
     }
-    $script_display_field .= "</script>\n";
+    $GLOBALS['script_display_field'] .= "</script>\n";
     //  return $GLOBALS['PMD'];       // many bases // not use ??????
 }
 
-function get_tab_info() // PMA_DBI //PMA_backquote
+/**
+ * retrieves table column info
+ *
+ * @uses    $GLOBALS['db']
+ * @uses    PMA_DBI_QUERY_STORE
+ * @uses    PMA_DBI_select_db()
+ * @uses    PMA_DBI_query()
+ * @uses    PMA_DBI_num_rows()
+ * @uses    PMA_backquote()
+ * @uses    count()
+ * @return  array   table column nfo
+ */
+function get_tab_info()
 {
-    global $db;
-    PMA_DBI_select_db($db);
+    PMA_DBI_select_db($GLOBALS['db']);
     $tab_column = array();
-    for ( $i=0; $i < sizeof( $GLOBALS['PMD']["TABLE_NAME"] ); $i++ ) {
-        PMA_DBI_select_db($db);
+    for ($i = 0; $i < count($GLOBALS['PMD']["TABLE_NAME"]); $i++) {
         $fields_rs   = PMA_DBI_query('SHOW FULL FIELDS FROM '.PMA_backquote($GLOBALS['PMD']["TABLE_NAME_SMALL"][$i]), NULL, PMA_DBI_QUERY_STORE);
-        $fields_cnt  = PMA_DBI_num_rows($fields_rs);
-        $j=0;
+        $j = 0;
         while ($row = PMA_DBI_fetch_assoc($fields_rs)) {
             $tab_column[$GLOBALS['PMD']['TABLE_NAME'][$i]]['COLUMN_ID'][$j]   = $j;
             $tab_column[$GLOBALS['PMD']['TABLE_NAME'][$i]]['COLUMN_NAME'][$j] = $row['Field'];
@@ -74,36 +99,51 @@ function get_tab_info() // PMA_DBI //PMA_backquote
             $j++;
         }
     }
-return $tab_column;
+    return $tab_column;
 }
-//-------------------------------------CONTR-----------------------------------------------
-function get_script_contr() {
-    global $db;
-    PMA_DBI_select_db($db);
+
+/**
+ * returns JavaScript code for intializing vars
+ *
+ * @uses    $GLOBALS['db']
+ * @uses    PMA_DBI_QUERY_STORE
+ * @uses    PMA_DBI_select_db()
+ * @uses    PMA_DBI_query()
+ * @uses    PMA_backquote()
+ * @uses    PMA_DBI_fetch_row()
+ * @uses    PMA_getForeigners()
+ * @uses    urlencode()
+ * @uses    count()
+ * @uses    in_array()
+ * @return string   JavaScript code
+ */
+function get_script_contr()
+{
+    PMA_DBI_select_db($GLOBALS['db']);
     $con["C_NAME"] = array();
     $i = 0;
-    $alltab_rs  = PMA_DBI_query('SHOW TABLES FROM ' . PMA_backquote($db), NULL, PMA_DBI_QUERY_STORE);
+    $alltab_rs  = PMA_DBI_query('SHOW TABLES FROM ' . PMA_backquote($GLOBALS['db']), NULL, PMA_DBI_QUERY_STORE);
     while ($val = @PMA_DBI_fetch_row($alltab_rs)) {
-        $row = PMA_getForeigners($db,$val[0],'','internal');
-        //echo "<br> internal ".$db." - ".$val[0]." - ";
+        $row = PMA_getForeigners($GLOBALS['db'], $val[0], '', 'internal');
+        //echo "<br> internal ".$GLOBALS['db']." - ".$val[0]." - ";
         //print_r($row );
         if ($row !== false) {
             foreach ($row as $field => $value) {
                 $con['C_NAME'][$i] = '';
-                $con['DTN'][$i]    = urlencode($db . "." . $val[0]);
+                $con['DTN'][$i]    = urlencode($GLOBALS['db'] . "." . $val[0]);
                 $con['DCN'][$i]    = urlencode($field);
                 $con['STN'][$i]    = urlencode($value['foreign_db'] . "." . $value['foreign_table']);
                 $con['SCN'][$i]    = urlencode($value['foreign_field']);
                 $i++;
             }
         }
-        $row = PMA_getForeigners($db,$val[0],'','innodb');
+        $row = PMA_getForeigners($GLOBALS['db'], $val[0], '', 'innodb');
         //echo "<br> INNO ";
         //print_r($row );
         if ($row !== false) {
             foreach ($row as $field => $value) {
                 $con['C_NAME'][$i] = '';
-                $con['DTN'][$i]    = urlencode($db.".".$val[0]);
+                $con['DTN'][$i]    = urlencode($GLOBALS['db'].".".$val[0]);
                 $con['DCN'][$i]    = urlencode($field);
                 $con['STN'][$i]    = urlencode($value['foreign_db'].".".$value['foreign_table']);
                 $con['SCN'][$i]    = urlencode($value['foreign_field']);
@@ -114,29 +154,44 @@ function get_script_contr() {
 
     $ti = 0;
     $script_contr = "<script>\n var contr = new Array();\n";
-    for ( $i=0; $i < sizeof( $con["C_NAME"] ); $i++ ) {
-        $script_contr .= " contr[$ti] = new Array();\n";
-        $script_contr .= "  contr[$ti]['".$con['C_NAME'][$i]."'] = new Array();\n";
-        if (in_array($con['DTN'][$i],$GLOBALS['PMD_URL']["TABLE_NAME"]) && in_array($con['STN'][$i],$GLOBALS['PMD_URL']["TABLE_NAME"])) {
-            $script_contr .= "  contr[$ti]['".$con['C_NAME'][$i]."']['".$con['DTN'][$i]."'] = new Array();\n";$m_col = array();//}
-            $script_contr .= "  contr[$ti]['".$con['C_NAME'][$i]."']['".$con['DTN'][$i]."']['".$con['DCN'][$i]."'] = new Array();\n";//}
-            $script_contr .= "    contr[$ti]['".$con['C_NAME'][$i]."']['".$con['DTN'][$i]."']['".$con['DCN'][$i]."'][0] = '".$con['STN'][$i]."';\n"; //
-            $script_contr .= "    contr[$ti]['".$con['C_NAME'][$i]."']['".$con['DTN'][$i]."']['".$con['DCN'][$i]."'][1] = '".$con['SCN'][$i]."';\n"; //
+    for ($i = 0; $i < count($con["C_NAME"]); $i++) {
+        $js_var = ' contr[' . $ti . ']';
+        $script_contr .= $js_var . " = new Array();\n";
+        $js_var .= "['" . $con['C_NAME'][$i] . "']";
+        $script_contr .= $js_var . " = new Array();\n";
+        if (in_array($con['DTN'][$i], $GLOBALS['PMD_URL']["TABLE_NAME"])
+         && in_array($con['STN'][$i], $GLOBALS['PMD_URL']["TABLE_NAME"])) {
+            $js_var .= "['" . $con['DTN'][$i] . "']";
+            $script_contr .= $js_var . " = new Array();\n";
+            $m_col = array();//}
+            $js_var .= "['" . $con['DCN'][$i] . "']";
+            $script_contr .= $js_var . " = new Array();\n";//}
+            $script_contr .= $js_var . "[0] = '" . $con['STN'][$i] . "';\n"; //
+            $script_contr .= $js_var . "[1] = '" . $con['SCN'][$i] . "';\n"; //
         }
-    $ti++;
+        $ti++;
     }
     $script_contr .= "</script>\n";
     return $script_contr;
 }
 
-function get_pk_or_unique_keys() {
-    global $db;
-    require_once('./libraries/tbl_indexes.lib.php');
+/**
+ * @uses    $GLOBALS['db']
+ * @uses    $GLOBALS['PMD']
+ * @uses    PMA_DBI_select_db()
+ * @uses    PMA_get_indexes()
+ * @uses    PMA_extract_indexes()
+ * @uses    count()
+ * @return  array unique or primary indizes
+ */
+function get_pk_or_unique_keys()
+{
+    require_once './libraries/tbl_indexes.lib.php';
 
-    PMA_DBI_select_db($db);
+    PMA_DBI_select_db($GLOBALS['db']);
     $tables_pk_or_unique_keys = array();
 
-    for( $I=0; $I<sizeof($GLOBALS['PMD']['TABLE_NAME_SMALL']); $I++) {
+    for ($I = 0; $I < count($GLOBALS['PMD']['TABLE_NAME_SMALL']); $I++) {
         $ret_keys = PMA_get_indexes($GLOBALS['PMD']['TABLE_NAME_SMALL'][$I]);
         if (! empty($ret_keys)) {
             // reset those as the function uses them by reference
@@ -145,7 +200,8 @@ function get_pk_or_unique_keys() {
             // for now, take into account only the first index segment
             foreach ($indexes_data as $key_name => $one_index) {
                 $column_name = $one_index[1]['Column_name'];
-                if (isset($indexes_info[$key_name]) && $indexes_info[$key_name]['Non_unique'] == 0) {
+                if (isset($indexes_info[$key_name])
+                 && $indexes_info[$key_name]['Non_unique'] == 0) {
                     $tables_pk_or_unique_keys[$GLOBALS['PMD']['OWNER'][$I] . '.' .$GLOBALS['PMD']['TABLE_NAME_SMALL'][$I] . '.' . $column_name] = 1;
                 }
             }
@@ -154,14 +210,25 @@ function get_pk_or_unique_keys() {
     return $tables_pk_or_unique_keys;
 }
 
-function get_all_keys() {
-    global $db;
-    require_once('./libraries/tbl_indexes.lib.php');
+/**
+ * returns all indizes
+ *
+ * @uses    $GLOBALS['db']
+ * @uses    $GLOBALS['PMD']
+ * @uses    PMA_DBI_select_db()
+ * @uses    PMA_get_indexes()
+ * @uses    PMA_extract_indexes()
+ * @uses    count()
+ * @return  array indizes
+ */
+function get_all_keys()
+{
+    require_once './libraries/tbl_indexes.lib.php';
 
-    PMA_DBI_select_db($db);
+    PMA_DBI_select_db($GLOBALS['db']);
     $tables_all_keys = array();
 
-    for( $I=0; $I<sizeof($GLOBALS['PMD']['TABLE_NAME_SMALL']); $I++) {
+    for ($I = 0; $I < count($GLOBALS['PMD']['TABLE_NAME_SMALL']); $I++) {
         $ret_keys = PMA_get_indexes($GLOBALS['PMD']['TABLE_NAME_SMALL'][$I]);
         if (! empty($ret_keys)) {
             // reset those as the function uses them by reference
@@ -177,6 +244,12 @@ function get_all_keys() {
     return $tables_all_keys;
 }
 
+/**
+ * @uses    $GLOBALS['PMD']
+ * @uses    count()
+ * @uses    in_array()
+ * @return  array   ???
+ */
 function get_script_tabs() {
     $script_tabs = "<script>\n var j_tabs = new Array();\n";
     for ( $i=0; $i < sizeof( $GLOBALS['PMD']['TABLE_NAME'] ); $i++ ) {
@@ -201,11 +274,12 @@ function get_tab_pos() {
     return isset($tab_pos) ? $tab_pos : NULL;
 }
 
-function get_owners() {
+function get_owners()
+{
     $m = array();
     $j = 0;
-    for ( $i=0; $i < sizeof( $GLOBALS['PMD']["OWNER"] ); $i++ ) {
-        if( ! in_array($GLOBALS['PMD']["OWNER"][$i],$m)) {
+    for ($i = 0; $i < count($GLOBALS['PMD']["OWNER"]); $i++) {
+        if (! in_array($GLOBALS['PMD']["OWNER"][$i],$m)) {
             $m[$j++] = $GLOBALS['PMD']["OWNER"][$i];
         }
     }