下面的代码:如何在用户输入为空不提交<html>
<head>
<title>提交与重置
</title>
<script>
function Kong()
{
fm=document.form1;
if(fm.Name.value==""||fm.pw1.value=="")
{
alert("Kong");
}
else
{
alert("No Kong");
}
}
</script>
</head>
<body>
<form name="form1" action="password.htm">
用户名:<input type="text" name="Name" size="20" /><br />
密 码:<input type="password" name="pw1" size="21" /><br />
<input type="submit" name="submit1" value="提交" onclick="Kong()" /><br />
<input type="reset" name="reset1" value="重置" /><br />
</form>
</body>
</html>
<head>
<title>提交与重置
</title>
<script>
function Kong()
{
fm=document.form1;
if(fm.Name.value==""||fm.pw1.value=="")
{
alert("Kong");
}
else
{
alert("No Kong");
}
}
</script>
</head>
<body>
<form name="form1" action="password.htm">
用户名:<input type="text" name="Name" size="20" /><br />
密 码:<input type="password" name="pw1" size="21" /><br />
<input type="submit" name="submit1" value="提交" onclick="Kong()" /><br />
<input type="reset" name="reset1" value="重置" /><br />
</form>
</body>
</html>
<head>
<title>提交与重置
</title>
<script>
function Kong()
{
fm=document.form1;
if(fm.Name.value==""||fm.pw1.value=="")
{
alert("Kong");
return;
}
else
{
alert("No Kong");
}
}
</script>
</head>
<body>
<form name="form1" action="password.htm">
用户名: <input type="text" name="Name" size="20" /> <br />
密 码: <input type="password" name="pw1" size="21" /> <br />
<input type="submit" name="submit1" value="提交" onclick="Kong()" /> <br />
<input type="reset" name="reset1" value="重置" /> <br />
</form>
</body>
</html>
<html>
<head>
<title>提交与重置
</title>
<script>
function Kong()
{
fm = document.form1;
if(fm.Name.value==""||fm.pw1.value=="")
{
alert("Kong");
return false;
}
else
{
alert("No Kong");
return true;
}
}
</script>
</head>
<body>
<form name="form1" action="password.htm" onsubmit="return Kong()">
用户名: <input type="text" name="Name" size="20" /> <br />
密 码: <input type="password" name="pw1" size="21" /> <br />
<input type="submit" name="submit1" value="提交" /> <br />
<input type="reset" name="reset1" value="重置" /> <br />
</form>
</body>
</html>
还可以这样吧 非空 才給action赋值
<html>
<head>
<title>提交与重置
</title>
<script>
function Kong()
{
fm = document.form1;
if(fm.Name.value==""||fm.pw1.value=="")
{
alert("Kong");
}
else
{
alert("No Kong");
document.form1.action="password.htm";
}
}
</script>
</head>
<body>
<form name="form1" action="" onsubmit="return Kong()">
用户名: <input type="text" name="Name" size="20" /> <br />
密 码: <input type="password" name="pw1" size="21" /> <br />
<input type="submit" name="submit1" value="提交" /> <br />
<input type="reset" name="reset1" value="重置" /> <br />
</form>
</body>
</html>
<html>
<head>
<title>提交与重置
</title>
<script>
function Kong()
{
fm=document.form1;
if(fm.Name.value==""||fm.pw1.value=="")
{
alert("Kong");
return false;
}
else
{
alert("No Kong");
return true;
}
}
</script>
</head>
<body>
<form name="form1" action="password.htm">
用户名: <input type="text" name="Name" size="20" /> <br />
密 码: <input type="password" name="pw1" size="21" /> <br />
<input type="submit" name="submit1" value="提交" onclick="return Kong()" /> <br />
<input type="reset" name="reset1" value="重置" /> <br />
</form>
</body>
</html>