Script to change column width by dragging in JGrid Prototype_javascript skills

By the way, I have also implemented the method of hiding and displaying a column that I have studied. But this function conflicts with css border-collapse:collapse; For details, see Code 2

<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>Jgrid drag to change table width</title> <style type="text/css"> <!-- * { font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px; color: #333333; } --> </style> <div> <table id="dataTable" border="1" cellpadding="0" cellspacing="0" style="table-layout:fixed;"> <colgroup> <col style="width:200px;"> <col style="width:100px;"> <col style="width:100px;"> <col style="width:100px;"> <col style="width:100px;"> </colgroup> <tr> <td>拖动我1</td> <td>拖动我2</td> <td>拖动我3</td> <td>拖动我4</td> <td>拖动我5</td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> </table> </div>
[Ctrl A Select all Note: If you need to introduce external Js, you need to refresh to execute

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Modified version 2

<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title> </title>jgrid drag to change table width_modified version<style type="text/css"> <!-- * { font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px; color: #333333; } --> </style> <div> <table id="dataTable" border="1" cellpadding="0" cellspacing="0" style="table-layout:fixed;border-collapse:collapse;"> <colgroup> <col style="width:200px;"> <col style="width:100px;"> <col style="width:100px;"> <col style="width:100px;"> <col style="width:100px;"> </colgroup> <tr> <td>拖动我1</td> <td>拖动我2</td> <td>拖动我3</td> <td>拖动我4</td> <td>拖动我5</td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> </table> </div>
[Ctrl A Select all Note:

If you need to introduce external Js, you need to refresh to execute
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When dragging down How did the big shadow come about?
It was shown deliberately. Change -moz-opacity:0.1;opacity: 0.1.