java1234,加入吧!
<input type="button" value="注册" onClick="window.location.href='register.jsp'"> (在当前页面打开reg.jsp)
<input type="button" value="注册" οnclick="javascript:location.href='reg.jsp'"> (在当前页面打开reg.jsp)
<input type="button" value="注册" οnclick="window.open('reg.jsp')"> (在新的页面打开reg.jsp)