W3Schools 在线编辑工具（TIY） V3.0
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<html> <head> <script type="text/javascript"> function bgChange(bg) { document.getElementById('x').style.background="url(" + bg + ")" } </script> </head> <body> <p>本例演示如何向 textarea 插入背景图像。</p> <p>请把鼠标移动到图像上，textarea 会获得一幅背景图像：</p> <table width="300" height="100"> <tr> <td onmouseover="bgChange('/i/eg_bg_03.gif')" background="/i/eg_bg_03.gif"></td> <td onmouseover="bgChange('/i/eg_bg_04.gif')" background="/i/eg_bg_04.gif"></td> </tr> </table> <form> <textarea id="x" rows="5" cols="20"> This example can not be edited because our editor uses a textarea for input, and your browser does not allow a textarea inside a textarea.