jsp页面怎么在控件为空的时候不提交信息啊？
我想用submit控件的disabled控制，该怎么写啊，往哪里加什么代码啊?还是说有别的方法<%@pagelanguage="java"pageEncoding="UT...
我想用submit控件的disabled控制，该怎么写啊，往哪里加什么代码啊?还是说有别的方法
<%@ page language="java" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>修改</title>
<script language="javascript">
function checkform(){
return checkname();
}
function checkename(){
var bb=document.getElementById("ename");
var b=bb.value;
var q=document.getElementById("enamemessage");
if(b==""){
q.innerHTML="<font color='red'>姓名不能为空</font>";
bb.focus();
return false;
}else
q.innerHTML="";
return true;
}
</script>
</head>
<body>
<form action="Employee" method="post">
<input type="hidden" name="action" value="modify"/>
<table style="font-size:12px" align="center" width="450" border="0" cellpadding="0" cellspacing="0">
<tr>
<td colspan="2" align="center" height="25" ></td>
</tr>
<tr height="25">
<td align="right">姓名 </td>
<td width="250"><input type="text" style="width:100px;" id="name" name="name"" onBlur="checkname();" />
<span id="namemessage"></span>
</td>
</tr>
<tr height="25">
<td width="450" align="center" colspan="2">
<input type="submit" value="修改" />
<input type="reset" value="取消" />
</td>
</tr>
<tr>
<td colspan="2" align="center" height="25" ></td>
</tr>
</table>
</form>
</body>
</html> 展开
<%@ page language="java" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>修改</title>
<script language="javascript">
function checkform(){
return checkname();
}
function checkename(){
var bb=document.getElementById("ename");
var b=bb.value;
var q=document.getElementById("enamemessage");
if(b==""){
q.innerHTML="<font color='red'>姓名不能为空</font>";
bb.focus();
return false;
}else
q.innerHTML="";
return true;
}
</script>
</head>
<body>
<form action="Employee" method="post">
<input type="hidden" name="action" value="modify"/>
<table style="font-size:12px" align="center" width="450" border="0" cellpadding="0" cellspacing="0">
<tr>
<td colspan="2" align="center" height="25" ></td>
</tr>
<tr height="25">
<td align="right">姓名 </td>
<td width="250"><input type="text" style="width:100px;" id="name" name="name"" onBlur="checkname();" />
<span id="namemessage"></span>
</td>
</tr>
<tr height="25">
<td width="450" align="center" colspan="2">
<input type="submit" value="修改" />
<input type="reset" value="取消" />
</td>
</tr>
<tr>
<td colspan="2" align="center" height="25" ></td>
</tr>
</table>
</form>
</body>
</html> 展开
展开全部
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>
修改
</title>
<script>
function checkform(form){
if(form.ename.value == ""){
enamemessage.innerHTML = "<font color='red'>姓名不能为空</font>";
form.ename.focus();
return false;
}
return true;
}
</script>
</head>
<body>
<form action="Employee" method="post" onsubmit="return checkform(this)">
<input type="hidden" name="action" value="modify"/>
<table style="font-size:12px" align="center" width="450" border="0" cellpadding="0" cellspacing="0">
<tr>
<td colspan="2" align="center" height="25" >
</td>
</tr>
<tr height="25">
<td align="right">
姓名
</td>
<td width="250">
<input type="text" style="width:100px;" name="ename" />
<span id="enamemessage">
</span>
</td>
</tr>
<tr height="25">
<td width="450" align="center" colspan="2">
<input type="submit" value="修改" />
<input type="reset" value="取消" />
</td>
</tr>
</table>
</form>
</body>
</html>
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