javascript 如果条件为真，则提交表单
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Submit form if condition is true
提问by mayank
I have this form:
我有这个表格：
<form action="http://targatesite.com" target="_blank" method="post" name="xyz" id="abc">
<input type="hidden" name="email" value="user_email" />
<input type="submit" name="sbmt" id="sbmt" value="user_value" class="user_class"/>
</form>
Suppose there is a variable VAR. The form can be submitted only when the value of VARis 1.
假设有一个变量VAR。只有当VAR 的值为1时才能提交表单。
In detail On click on submit it will firstly check the value of VARand if it returns truefrom will submitted and redirect to page given in action. And if it returns Falseit will show a message that Please check value of VAR
详细点击提交时，它将首先检查VAR的值，如果它返回true，则将提交并重定向到操作中给出的页面。如果它返回False它将显示一条消息，请检查 VAR 的值
ImpVAR is not the field of form. We are getting this value from database.
ImpVAR 不是形式领域。我们从数据库中获取这个值。
回答by Somnath Kharat
Add onSubmit="return submit();"
添加 onSubmit="return submit();"
<form action="http://targatesite.com" target="_blank" method="post" name="xyz" id="abc"> <input type="hidden" name="email" value="user_email" />
<input type="submit" name="sbmt" id="sbmt" value="user_value" class="user_class" onSubmit="return submit();"/>
</form>
Try this Script :
试试这个脚本：
function submit(){
if(var==1){
return true;
}
else{
alert("Please check value of VAR")
return false;
}
}
回答by Sergio
$('#abc').on('submit', function(){
if(VAR == 1){
return true;
}
alert('Please check value of VAR');
return false;
});
This will work. The only thing you need to check is that VARis in the scope of this function.
这将起作用。您唯一需要检查的VAR是在此函数的范围内。
回答by bipen
try this
试试这个
var MYVAR=true;
$('#abc').submit(function(){
if(MYVAR){
return true;
}
alert('check the value of VAR');
return false;
});
回答by Prashant Parekh
Yes you can check VAR variable value from database,
是的，您可以从数据库中检查 VAR 变量值，
when you have to submit form, you can code like this
当你必须提交表单时，你可以这样编码
if($_POST['sbmt']){
$query = 'SELECT var FROM tablename';
// here you can check var value
if(VAR==1){
//submit your form
} else {
$error_msg = 'Please check value of VAR';
}
}
print this $error_msg whenever you want to show.
每当您想显示时打印此 $error_msg 。
