<script language="JavaScript">
function br()
{
alert("换\r行")
}function enter(){alert("第一行\r\r第二行")}</script><html><body><a href="JavaScript:br()">换行</a><br><br><a href="JavaScript:enter()">回车</a></body></html><script language="JavaScript">function br(){alert("换\r行")}function enter(){alert("第一行\r\r第二行")}</script><html><body><a href="JavaScript:br()">换行</a><br><br><a href="JavaScript:enter()">回车</a></body></html>