title: Z-Index not working over table elements
body: <p>I have tried a lot but unable to figure out whats wrong. The z-index is not working at all when hovering over the <strong>Available Balance</strong> <strong><em>question mark (?)</em></strong>. Upon hover over the question mark <strong><em>(?)</em></strong>, it can be noticed that the tooltip is getting cut by the table heading area. Can someone please guide me what needs to be changed? Here is the complete code I am working with. Sorry for the long code but I have tried to put in as much as I can for some one to figure this out.</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>/* SECONDARY TOOLTIP (S) */
  [tooltip] {
   position: relative;
  }
  
  /* Arrow */
  [tooltip]:before {
   width: 16px;
   height: 6px;
   left: 50%;
   margin-top: 1px;
   top: calc(100% - 10px);
   opacity: 1;
   content: '';
   position: absolute;
   z-index: 10;
   box-sizing: border-box;
   border-left: 8px solid transparent;
   border-right: 8px solid transparent;
   border-bottom: 10px solid #00204e;
   transform: translate(-50%, 0%);
   opacity: 0;
   -webkit-transition: all 0.2s cubic-bezier(0.71, 1.7, 0.77, 1.24);
   -moz-transition: all 0.2s cubic-bezier(0.71, 1.7, 0.77, 1.24);
   -ms-transition: all 0.2s cubic-bezier(0.71, 1.7, 0.77, 1.24);
   -o-transition: all 0.2s cubic-bezier(0.71, 1.7, 0.77, 1.24);
   transition: all 0.2s cubic-bezier(0.71, 1.7, 0.77, 1.24);
   pointer-events: none;
  }
  
  /* Text */
  [tooltip]:after {
   transform: translate(-50%, 0%);
   left: 50%;
   margin-top: 11px;
   top: calc(100% - 10px);
   opacity: 1;
   font-weight: normal;
   text-shadow: none;
   background: #00204e;
   border-radius: 4px;
   color: #fff;
   content: attr(tooltip);
   padding: 10px;
   position: absolute;
   white-space: normal;
   width: max-content;
   font-size: 9px;
   font-family: 'Helvetica Neue';
   line-height: normal;
   max-width: 150px;
   text-align: left;
   height: auto;
   display: inline-block;
   opacity: 0;
   -webkit-transition: all 0.2s cubic-bezier(0.71, 1.7, 0.77, 1.24);
   -moz-transition: all 0.2s cubic-bezier(0.71, 1.7, 0.77, 1.24);
   -ms-transition: all 0.2s cubic-bezier(0.71, 1.7, 0.77, 1.24);
   -o-transition: all 0.2s cubic-bezier(0.71, 1.7, 0.77, 1.24);
   transition: all 0.2s cubic-bezier(0.71, 1.7, 0.77, 1.24);
   pointer-events: none;
   /* overflow: overlay; */
   z-index: 999999;
  }
  
  [tooltip]:hover:before,
  [tooltip]:hover:after {
   opacity: 1;
   pointer-events: auto;
   top: calc(100% + 0px);
   z-index: 99999;
   overflow: visible;
   position: absolute;
  }
  /* SECONDARY TOOLTIP (E) */
  
  
  .claro .dojoxGridHeader:first-child .dojoxGridRowTable {
      border-left-width: 0;
  }
  .claro .dojoxGridMasterHeader .dojoxGridRowTable {
      border-left: 1px solid #BCBCBC;
      border-right: 1px solid white;
      background-color: transparent;
  }
  .base .dojoxGridRowTable {
      height: 30px !important;
      word-wrap: break-word;
  }
  table.dojoxGridRowTable {
      table-layout: auto;
  }
  .dojoxGridHeader table {
      text-align: center;
  }
  .dojoxGrid table {
      padding: 0;
  }
  .dojoxGridRowTable {
      table-layout: fixed;
      width: 0;
      empty-cells: show;
  }
  table {
      font-size: 100%;
  }
  
  table[Attributes Style] {
      border-top-width: 0px;
      border-right-width: 0px;
      border-bottom-width: 0px;
      border-left-width: 0px;
      -webkit-border-horizontal-spacing: 0px;
      -webkit-border-vertical-spacing: 0px;
  }
  user agent stylesheet
  table {
      display: table;
      border-collapse: separate;
      border-spacing: 2px;
      border-color: grey;
  }
  
  .claro .dojoxGridHeader:first-child {
      /* margin-left: -50px; */
      text-align: left;
      margin: 0px -1px;
  }
  .dojoxGridHeader {
      position: absolute;
      overflow: hidden;
      cursor: default;
  }
  
  .base .dojoxGrid {
      background-color: #FFFFFF;
      font-size: 12px;
      color: #00204e;
      padding: 0px 1px 20px 0px;
      border-top: 0px;
      height: 40px;
      /* margin-top: 115px; */
      /* border-top: solid 1px #D0D0D0; */
      /* border-bottom: solid 1px #D0D0D0; */
      /* margin-bottom: 20px; */
      width: 100%;
      /* width: 647px; */
      /* height: 226px !important; */
  }
  .base .dojoxGrid {
      background-color: transparent;
      border-width: 1px 0 0 0;
      font-size: 1em;
  }
  .base .dojoxGrid {
      font-size: 0.916em;
  }
  .dojoxGrid {
      position: relative;
      background-color: #EBEADB;
      font-family: Geneva, Arial, Helvetica, sans-serif;
      -moz-outline-style: none;
      outline: none;
      overflow: hidden;
      height: 0;
  }
  
  .portlet {
      margin: 4px 0 30px 0;
      padding: 0;
      font-size: 0.75em;
  }
  
  body {
      /* font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; */
      font-size: 14px;
      color: #00204c;
      /* margin-left: 125px; */
      margin: 0 auto;
  }
  
  tbody {
      display: table-row-group;
      vertical-align: middle;
      border-color: inherit;
  }
  .base .dojoxGridRowTable {
      height: 30px !important;
      word-wrap: break-word;
  }
  .dojoxGridHeader table {
      text-align: center;
  }
  .dojoxGridRowTable {
      table-layout: fixed;
      width: 0;
      empty-cells: show;
  }
  table {
      font-size: 100%;
  }
  
  
  table {
      display: table;
      border-collapse: separate;
      border-spacing: 2px;
      border-color: grey;
  }
  
  .claro .dojoxGridHeader:first-child {
      /* margin-left: -50px; */
      text-align: left;
      margin: 0px -1px;
  }
  
  .dojoxGridHeader {
      position: absolute;
      overflow: hidden;
      cursor: default;
  }
  
  .base .dojoxGrid {
      background-color: #FFFFFF;
      font-size: 12px;
      color: #00204e;
      padding: 0px 1px 20px 0px;
      border-top: 0px;
      height: 40px;
      /* margin-top: 115px; */
      /* border-top: solid 1px #D0D0D0; */
      /* border-bottom: solid 1px #D0D0D0; */
      /* margin-bottom: 20px; */
      width: 100%;
      /* width: 647px; */
      /* height: 226px !important; */
  }
  .base .dojoxGrid {
      background-color: transparent;
      border-width: 1px 0 0 0;
      font-size: 1em;
  }
  .base .dojoxGrid {
      font-size: 0.916em;
  }
  .dojoxGrid {
      position: relative;
      background-color: #EBEADB;
      font-family: Geneva, Arial, Helvetica, sans-serif;
      -moz-outline-style: none;
      outline: none;
      overflow: hidden;
      height: 0;
  }
  
  .claro .dojoxGridHeader .dojoxGridRowTable tr {
      background: none;
  }
  .claro .dojoxGridRowTable tr {
      background: url(images/row_back.png) #fff repeat-x;
  }
  
  tr {
      display: table-row;
      vertical-align: inherit;
      border-color: inherit;
  }
  
  .base .dojoxGridRowTable {
      height: 30px !important;
      word-wrap: break-word;
  }
  .dojoxGridHeader table {
      text-align: center;
  }
  .dojoxGridRowTable {
      table-layout: fixed;
      width: 0;
      empty-cells: show;
  }
  table {
      font-size: 100%;
  }
  
  table {
      display: table;
      border-collapse: separate;
      border-spacing: 2px;
      border-color: grey;
  }
  
  .claro .dojoxGridHeader:first-child {
      /* margin-left: -50px; */
      text-align: left;
      margin: 0px -1px;
  }
  .dojoxGridHeader {
      position: absolute;
      overflow: hidden;
      cursor: default;
  }
  
  .base .dojoxGrid {
      background-color: #FFFFFF;
      font-size: 12px;
      color: #00204e;
      padding: 0px 1px 20px 0px;
      border-top: 0px;
      height: 40px;
      /* margin-top: 115px; */
      /* border-top: solid 1px #D0D0D0; */
      /* border-bottom: solid 1px #D0D0D0; */
      /* margin-bottom: 20px; */
      width: 100%;
      /* width: 647px; */
      /* height: 226px !important; */
  }
  .base .dojoxGrid {
      background-color: transparent;
      border-width: 1px 0 0 0;
      font-size: 1em;
  }
  .base .dojoxGrid {
      font-size: 0.916em;
  }
  .dojoxGrid {
      position: relative;
      background-color: #EBEADB;
      font-family: Geneva, Arial, Helvetica, sans-serif;
      -moz-outline-style: none;
      outline: none;
      overflow: hidden;
      height: 0;
  }
  
  #AccountSummarySavingsListPortlet th[idx="3"], #AccountSummarySavingsListPortlet td[idx="3"] {
      text-align: right !important;
  }
  .claro .dojoxGridHeader tr:first-child .dojoxGridCell {
      border-top: 1px solid transparent;
  }
  .base .dojoxGridHeader th.dojoxGridCell {
      background: none repeat scroll 0 0 #FFFFFF;
      font-size: 1em;
      font-weight: bold;
      color: #00204e;
      border-bottom: thin;
      border-bottom-style: solid;
      border-bottom-color: #D0D0D0;
      height: 20px;
      text-align: left !important;
      /* white-space: nowrap !important; */
      padding: 15px 0px;
  }
  .base .dojoxGridHeader th.dojoxGridCell {
      background: none repeat scroll 0 0 #7692B7;
  }
  .base .dojoxGridHeader .dojoxGridCell {
      padding: 5px;
  }
  .base .dojoxGridHeader .dojoxGridCell {
      border: 1px solid #fff;
      font-weight: bold;
      color: #fff;
  }
  .base .dojoxGridHeader .dojoxGridCell {
      text-align: center;
  }
  .claro .dojoxGridHeader .dojoxGridCell {
      padding: 2px 5px;
      background: transparent;
      border-bottom: 1px solid #BCBCBC;
      border-top: 1px solid white;
      border-left: 1px solid white;
      border-right: 1px solid #BCBCBC;
      vertical-align: top;
  }
  .claro .dojoxGridHeader .dojoxGridCell {
      background: url(images/header.png) #e5edf4 repeat-x top;
      border-style: solid;
      border-width: 1px;
      border-color: #BCBCBC #BCBCBC #BCBCBC transparent;
  }
  .base .dojoxGrid th {
      text-align: center;
  }
  .base .dojoxGridCell {
      border: none;
      /* padding-left: 0px; */
  }
  .base .dojoxGridCell {
      border: none;
      /* padding-left: 0px; */
  }
  .base .dojoxGridCell {
      border: 1px solid #fff;
      padding-left: 3px !important;
  }
  .claro .dojoxGridCell, .claro .dojoxGridCellFocus {
      outline: none;
  }
  .claro .dojoxGridCell {
      padding: 3px 5px;
      border-color: transparent #E5DAC8 #E5DAC8 transparent;
  }
  .claro .dojoxGridCell {
      padding: 0px;
      border: 1px solid transparent;
  }
  
  
  
  .base .dojoxGridHeader th.dojoxGridCell {
      background: none repeat scroll 0 0 #FFFFFF;
      font-size: 1em;
      font-weight: bold;
      color: #00204e;
      border-bottom: thin;
      border-bottom-style: solid;
      border-bottom-color: #D0D0D0;
      height: 20px;
      text-align: left !important;
      /* white-space: nowrap !important; */
      padding: 15px 0px;
  }
  .base .dojoxGridHeader th.dojoxGridCell {
      background: none repeat scroll 0 0 #7692B7;
  }
  .base .dojoxGridHeader .dojoxGridCell {
      padding: 5px;
  }
  .base .dojoxGridHeader .dojoxGridCell {
      border: 1px solid #fff;
      font-weight: bold;
      color: #fff;
  }
  .base .dojoxGridHeader .dojoxGridCell {
      text-align: center;
  }
  .claro .dojoxGridHeader .dojoxGridCell {
      padding: 2px 5px;
      background: transparent;
      border-bottom: 1px solid #BCBCBC;
      border-top: 1px solid white;
      border-left: 1px solid white;
      border-right: 1px solid #BCBCBC;
      vertical-align: top;
  }
  .claro .dojoxGridHeader .dojoxGridCell {
      background: url(images/header.png) #e5edf4 repeat-x top;
      border-style: solid;
      border-width: 1px;
      border-color: #BCBCBC #BCBCBC #BCBCBC transparent;
  }
  .base .dojoxGrid th {
      text-align: center;
  }
  .base .dojoxGridCell {
      border: none;
      /* padding-left: 0px; */
  }
  .base .dojoxGridCell {
      border: none;
      /* padding-left: 0px; */
  }
  .base .dojoxGridCell {
      border: 1px solid #fff;
      padding-left: 3px !important;
  }
  .claro .dojoxGridCell, .claro .dojoxGridCellFocus {
      outline: none;
  }
  .claro .dojoxGridCell {
      padding: 3px 5px;
      border-color: transparent #E5DAC8 #E5DAC8 transparent;
  }
  .claro .dojoxGridCell {
      padding: 0px;
      border: 1px solid transparent;
  }
  .dojoxGridHeader .dojoxGridCell {
      border: 1px solid;
      border-color: #F6F4EB #ACA899 #ACA899 #F6F4EB;
      background: url(images/grid_dx_gradient.gif) #E8E1CF top repeat-x;
      padding-bottom: 2px;
  }
  .dojoxGridCell {
      border: 1px solid;
      border-color: #EBEADB;
      border-right-color: #D5CDB5;
      padding: 3px 3px 3px 3px;
      text-align: left;
      overflow: hidden;
  }
  caption, th {
      text-align: left;
  }
  address, caption, cite, code, dfn, th, var {
      font-style: normal;
      font-weight: normal;
  }
  body, div, dl, dt, dd, li, h1, h2, h3, h4, h5, h6, pre, form, fieldset, input, textarea, p, blockquote, th, td {
      /* margin: 0; */
      padding: 0;
  }
  
  
  th {
      font-weight: bold;
      text-align: -internal-center;
  }
  
  
  table {
      font-size: 100%;
  }
  
  /*------------------------------------------ */
  
  table {
      display: table;
      border-collapse: separate;
      border-spacing: 2px;
      border-color: grey;
  }
  
  #A_12 {
    border: 1px solid #00204e;
   border-radius: 50%;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;table class="dojoxGridRowTable" border="0" cellspacing="0" cellpadding="0" role="presentation" style="width: 1001px;" id="TABLE_1"&gt;&lt;tbody id="TBODY_2"&gt;&lt;tr id="TR_3"&gt;&lt;th tabindex="-1" aria-readonly="true" role="columnheader" id="TH_4" class="dojoxGridCell dojoDndItem  dojoxGridCellFocus" idx="0" style="text-align: center;text-align: center;width:30%;" dndtype="gridColumn_grid1522757357169402654"&gt;&lt;div class="dojoxGridSortNode" id="DIV_5"&gt;Account&lt;/div&gt;&lt;/th&gt;&lt;th tabindex="-1" aria-readonly="true" role="columnheader" id="TH_6" class="dojoxGridCell dojoDndItem" idx="1" style="text-align: center;text-align: center;width:5%;" dndtype="gridColumn_grid1522757357169402654"&gt;&lt;div class="dojoxGridSortNode" id="DIV_7"&gt;Currency&lt;/div&gt;&lt;/th&gt;&lt;th tabindex="-1" aria-readonly="true" role="columnheader" id="TH_8" class="dojoxGridCell dojoDndItem" idx="2" style="text-align: right;text-align: center;width:12%;" dndtype="gridColumn_grid1522757357169402654"&gt;&lt;div class="dojoxGridSortNode" id="DIV_9"&gt;Pending balance&lt;/div&gt;&lt;/th&gt;&lt;th tabindex="-1" aria-readonly="true" role="columnheader" id="TH_10" class="dojoxGridCell dojoDndItem" idx="3" style="text-align: right;text-align: center;width:12%;" dndtype="gridColumn_grid1522757357169402654"&gt;&lt;div class="dojoxGridSortNode" id="DIV_11"&gt;Available balance&lt;/div&gt;&lt;a tooltip="this is a test" style="
      position: relative;
      text-align: center;
      width: 100%;
      display: block;
      /* overflow: visible; */
  " id="A_12"&gt;?&lt;/a&gt;
  &lt;/th&gt;&lt;th tabindex="-1" aria-readonly="true" role="columnheader" id="TH_13" class="dojoxGridCell dojoDndItem" idx="4" style="text-align: center;text-align: center;width:12%;" dndtype="gridColumn_grid1522757357169402654"&gt;&lt;div class="dojoxGridSortNode" id="DIV_14"&gt;Accrued Interest Rate&lt;/div&gt;&lt;/th&gt;&lt;th tabindex="-1" aria-readonly="true" role="columnheader" id="TH_15" class="dojoxGridCell dojoDndItem" idx="5" style="text-align: center;text-align: center;width:10%;" dndtype="gridColumn_grid1522757357169402654"&gt;&lt;div class="dojoxGridSortNode" id="DIV_16"&gt;Active&lt;/div&gt;&lt;/th&gt;&lt;th tabindex="-1" aria-readonly="true" role="columnheader" id="TH_17" class="dojoxGridCell dojoDndItem " idx="6" style="text-align: center;text-align: center;width:12%;" dndtype="gridColumn_grid1522757357169402654"&gt;&lt;div class="dojoxGridSortNode" id="DIV_18"&gt;Interest Rate&lt;/div&gt;&lt;/th&gt;&lt;/tr&gt;&lt;/tbody&gt;&lt;/table&gt;</code></pre>
  </div>
  </div>
  </p>