代码如下：
<SCRIPT LANGUAGE="JavaScript"> <!-- Begin function moveWindowLeft() { window.moveBy(-15, 0); window.moveBy(0, 0); } function moveWindowRight() { window.moveBy(15, 0); window.moveBy(0, 0); } function moveWindowUp() { window.moveBy(0, 0); window.moveBy(0, -15); } function moveWindowDown() { window.moveBy(0, 0); window.moveBy(0, 15); } // End --> </script> <center> <form> <table> <tr> <td> </td> <td> <input type=button value="向上" onClick="moveWindowUp();"> </td> <td> </td> </tr> <tr> <td> <input type=button value="向左" onClick="moveWindowLeft();"> </td> <td> </td> <td> <input type=button value="向右" onClick="moveWindowRight();"> </td> </tr> <tr> <td> </td> <td> <input type=button value="向下" onClick="moveWindowDown();"> </td> <td> </td> </tr> </table> </form> </center>