客户端数据验证
想实现客户端的数据验证：
<script language= "javascript ">
function check()
{
......
......
}
//该函数是验证函数
//当验证到错误（如必填项未填)时，返回false,否则返回true
</script>
现有一个提交按钮submit,如何才能实现数据验证功能？
<input type= "submit " name= "submit " onclick= "check() "> 吗？


[解决办法]
<input name= "Submit " type= "submit " class= "form04 " value= "注 册 " onclick= "return check(); " />

<script language= "javascript ">
function check()
{
var UserName = document.form1.UserName.value;

if (UserName== " ")
{
alert( "请输入用户名！ ");
document.form1.UserName.focus();
return false;
}

}
</script>
[解决办法]
To :longlangaa() 实在是对不起，我看错了，我以为是text文本框了

请把把那个onblur改为onclick，如果是输入框可以用onblur这个


同时，你的check（）函数返回值应该是true 或者false，这样才行，在一个看一下是不是你的check里面有错误，没有走到return 语句阿，如果是这样的话，那么就会提交了

<input type= "submit " name= "submit " onclick= "return check() ">
[解决办法]
function checkinfo()
{
if(FormInfo.email_user.value== " "||
FormInfo.PassportID.value== " "||
FormInfo.Age.value== " "||
FormInfo.QQ.value== " "||
FormInfo.TaobaoID.value== " "||
FormInfo.HopeCity.value== " "||
FormInfo.HaveWebsite.value== "http:// ")
{
alert( "请填写必填项! ");
return false;
}
else return true;

}
这样吧？
[解决办法]
想实现客户端的数据验证：
<script language= "javascript ">
function check()
{
if(document.form1.test.value== " "){
alert( "error ");
return false;
}else{
document.form1.submit();
}
}
//该函数是验证函数
//当验证到错误（如必填项未填)时，返回false,否则返回true
</script>
现有一个提交按钮submit,如何才能实现数据验证功能？
<form id= "form1 " name= "form1 " method= "post " action= " ">
<input type= "text " name= "test " />
<input type= "submit " name= "submit " onclick= "check();return false; "> 吗？
</form>

[解决办法]
to 楼上：

向下面那样写就行了

<script language= "javascript ">
function check()
{
if(document.form1.test.value== " "){
alert( "error ");
return false;
}else{
return true;
}
}
//该函数是验证函数
//当验证到错误（如必填项未填)时，返回false,否则返回true
</script>
现有一个提交按钮submit,如何才能实现数据验证功能？
<form id= "form1 " name= "form1 " method= "post " action= " ">
<input type= "text " name= "test " />
<input type= "submit " name= "submit " onclick= "return check(); ">
</form>


------解决方案--------------------

用onSubmit不就可以了啊
<form name= "frmLogin " action= "login.asp?action=login " method= "post " onSubmit= "return CheckForm(); ">
....
</Form>

[解决办法]
function Check()
{
if(document.form1.email_user.value== " ")
{
alert( "error ");
return false;
}
else
{
return true;
}
}

<form id= "form1 " action= " " name= "form1 " method= "post " >
<input type= "text " name= "email_user " width= "200px " >
<input type= "submit " name= "submit " value= "提交 " onClick= "return Check(); "> /*这里注意了*/
</form>

[解决办法]
<form action= " " name= "form1 " method= "post " onsubmit= "return Check() " >
<input type= "text " name= "email_user " width= "200px " >
<input type= "submit " name= "submit " value= "提交 ">
</form>
验证通过才提交数据，没通过停止提交
[解决办法]
<form action= " " name= "form1 " method= "post " onsubmit= "return check() " >

我就是这样做的!注意: check()就是你的验证函数.

绝对好!
[解决办法]
LZ太不厚道哈，总是解决该给分了吧
[解决办法]
想实现客户端的数据验证：
<script language= "javascript ">
function check()
{
return false;
}
//该函数是验证函数
//当验证到错误（如必填项未填)时，返回false,否则返回true
</script>
现有一个提交按钮submit,如何才能实现数据验证功能？
<input type= "submit " name= "submit " onclick= "return check() "> 吗？