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<html><head><style>table, td { border: 1px solid black;}</style></head><body><p>Click on each tr element to alert its index position in the table:</p><table> <tr onclick="myFunction(this)"> <td>Click to show rowIndex</td> </tr> <tr onclick="myFunction(this)"> <td>Click to show rowIndex</td> </tr> <tr onclick="myFunction(this)"> <td>Click to show rowIndex</td> </tr></table><script>function myFunction(x) { alert("Row index is: " + x.rowIndex);}</script></body></html>