<script language="javascript">
function check (form){
if(form.title.value==""){
alert("请输入公告标题!");
form.title.focus();
return false;
}
if(form.content.value==""){
alert("请输入公告内容!");
form.content.focus();
return false;
}
form.submit();
}
</script>
每段代码代表什么意思希望达人们解释.................
function check (form){
if(form.title.value==""){
alert("请输入公告标题!");
form.title.focus();
return false;
}
if(form.content.value==""){
alert("请输入公告内容!");
form.content.focus();
return false;
}
form.submit();
}
</script>
每段代码代表什么意思希望达人们解释.................
function check (form){
if(form.title.value==""){//ie为title标签value为空进入
alert("请输入公告标题!");//弹出警告
form.title.focus();//title标签活动焦点
return false;//退出方法
}
if(form.content.value==""){//id为content标签value为空进入
alert("请输入公告内容!");//弹出警告
form.content.focus();//content标签活动焦点
return false;//退出方法
}
form.submit();//如果都填写了,提交表单
}
</script>
如果title为空 弹出提示框 焦点置于title输入框
如果内容为空 弹出提示框 焦点置于content输入框
否则 将表单内容提交
<body>
<form id="form1" name="form1" method="post" action="zhucesuccess.php">
<table width="317" border="0" align="center">
<tr>
<td align="right">用户名:</td>
<td><label>
<input type="text" name="username" id="textfield" />
</label></td>
</tr>
<tr>
<td align="right">密码:</td>
<td><input type="password" name="pwd" id="textfield2" /></td>
</tr>
<tr>
<td align="right">再次输入密码:</td>
<td><input type="password" name="repwd" id="textfield3" /></td>
</tr>
<tr>
<td align="right">性别:</td>
<td><input type="text" name="sex" id="textfield4" /></td>
</tr>
<tr>
<td> </td>
<td><label>
<input type="submit" name="button" id="button" value="提交" />
<input type="reset" name="button2" id="button2" value="重置" />
</label></td>
</tr>
</table></form>
<script language="javascript">
function check (form){
if (form.username.value ==""){
alert ("请输入用户名");
form.username.focus();
return false;
}
if (form.pwd.value ==""){
alert ("请输入密码");
form.pwd.focus();
return false;
}
if(form.repwd.value ==""){
alert ("请重新输入密码");
form.repwd.focus();
returen false;
}
form.submit();
}
function check (form){
if (form.pwd.value == form.repwd.value){
}
else{
alert ("两次输入的密码不匹配!");
}
}
</script>
<form id="form1" name="form1" method="post" action="zhucesuccess.php" onsubmit="return check(this)">
<table width="317" border="0" align="center">
<tr>
<td align="right">用户名:</td>
<td><label>
<input type="text" name="username" id="textfield" />
</label></td>
</tr>
<tr>
<td align="right">密码:</td>
<td><input type="password" name="pwd" id="textfield2" /></td>
</tr>
<tr>
<td align="right">再次输入密码:</td>
<td><input type="password" name="repwd" id="textfield3" /></td>
</tr>
<tr>
<td align="right">性别:</td>
<td><input type="text" name="sex" id="textfield4" /></td>
</tr>
<tr>
<td> </td>
<td><label>
<input type="submit" name="button" id="button" value="提交" />
<input type="reset" name="button2" id="button2" value="重置" />
</label></td>
</tr>
</table></form>
<script language="javascript">
function check (form){
if (form.username.value ==""){
alert ("请输入用户名");
form.username.focus();
return false;
}
if (form.pwd.value ==""){
alert ("请输入密码");
form.pwd.focus();
return false;
}
if(form.repwd.value ==""){
alert ("请重新输入密码");
form.repwd.focus();
return false;
}
if (form.pwd.value != form.repwd.value){
alert ("两次输入的密码不匹配!");
return false;
}
</script>
<form id="form1" name="form1" method="post" action="zhucesuccess.php" onsubmit="return check(this)">错误2:
returen false;错误3:
定义两个check,并且后面那个还是有问题的
<script>
var time = 3;
function fun(){
document.getElementById("div").innerHTML = "还有" + time + "秒跳转到首页";
if(time == 0){
location.href = "http://www.baidu.com";
}
--time;
}
setInterval(fun, 1000);
</script>