Send a table operation class written by yourself (add, delete, sort, move up, move down)_javascript skills

<meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <style type="text/css">*{font-size:14px}button{margin:3px}</style> <button onclick="javascript:mytable.rnd()"> </button>Randomly select rows<button onclick="javascript:mytable.add()"> </button>Add a line<button onclick="javascript:mytable.del()"> </button>Delete selected rows<button onclick="javascript:mytable.up()"> </button>Move selected row up<button onclick="javascript:mytable.down()"> </button>Move selected row down<button onclick="javascript:mytable.sort(1)"> </button>Sort by first column number<button onclick="javascript:mytable.sort(f)"> </button>Sort by the sum of each row of data<table width="100%"> <tr> <td valign="top"> <table border id="tbl" width="80%"></table> </td> <td valign="top"> <table border id="tbl2" width="80%"></table> </td> </tr> </table> <button onclick="javascript:mytable2.rnd()"> </button>Randomly select rows<button onclick="javascript:mytable2.add()"> </button>Add a line<button onclick="javascript:mytable2.del()"> </button>Delete selected rows<button onclick="javascript:mytable2.up()"> </button>Move selected row up<button onclick="javascript:mytable2.down()"> </button>Move selected row down<button onclick="javascript:mytable2.sort(2)"> </button>Sort by second column number<button onclick="javascript:mytable2.sort(f)"> </button>Sort by the sum of each row of data