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| <SCRIPT language=JavaScript> function checkForm(){ |
| var user=document.getElementById("username"); |
| var pwd=document.getElementById("password"); |
| if(user.value==""){ |
| alert('用户名不允许为空'); |
| user.focus(); |
| return false; |
| } |
| if(pwd.value==""){ |
| alert('密码不允许为空'); |
| pwd.focus(); |
| return false; |
| } |
| document.forms[0].submit(); |
| //window.location.href="index.php"; |
| } |
| </SCRIPT> |
| <FORM name=loginform action="index.php" method="post" > <TABLE cellSpacing=0 cellPadding=2 width="50%" border=0> | |
| <TBODY valign="middle"> | |
| <TR> | |
| <TD class=c92 width="24%">用户名</TD> | |
| <TD width="76%"><INPUT class=input size=16 id="username" name='userName' value="" | |
| onKeyUp="if(event.keyCode==13) document.getElementById('password').focus();" style="width:106"> </TD></TR> | |
| <TR> | |
| <TD class=c92 width="24%">密 码</TD> | |
| <TD width="76%"><INPUT class=input type=password size=16 id="password" name="password" | |
| onKeyDown="if(event.keyCode==13) return checkForm()" value="" style="width:106"></TD></TR> | |
| <TR> | |
| <TD width="24%"> </TD> | |
| <TD width="76%"><input type="hidden" name="submitted" value="submitted"> | |
| <DIV align=left> | |
| <IMG style="CURSOR: hand" onClick="return checkForm()" src="./images/images/login.png" border=0 > | |
| | |
| <IMG style="CURSOR: hand" src="./images/images/regist.png" border=0 onclick=location.href='./register.php';> | |
| </DIV></TD></TR></TBODY></TABLE></FORM> |
input 回车键提交与不提交表单的解决方法