Javascript to limit the text field input

[SunnyB]

Hello everybody,

I have a field in the datapage that accepts upto 2 characters. i want to limit the input entered to <=25. Any idea how do i do that. I know i have to write some kinda javascript.

Here's the datapage:

http://b2.caspio.com/dp.asp?AppKey=72721000i7b3a2a7d3j2i5h9h1j9

Field name is Total no. of students taught each day:

the user input should not exceed 25.

Please help..

[MeghaJ]

Hi,

If I have understood your question correctly, before submitting the form, you want to check whether the field has value less than 25 or not.

You are right that you need a JavaScript for this.

a hint:

var student = getElementById("InsertRecordfieldname");

var student_num = parsefloat(student.value);

if(student_num>25)

alert("Student number cant be more than 25");

There is another possible solution for this. If it is possible to have a range instead of exact number, you can have a range dropdown for this.

So you can have custom values:

Display Value

0-5 5

5-10 10

etc.

Regards,

Megha

[SunnyB]

Thankyou very much, the javascript worked. You are a lifesaver

[cheonsa]

Hi @SunnyB,

 

Using the standard feature of Caspio, you can set the minimum and the maximum characters allowed in a field without using JavaScript. 

You just need to indicate your preferred length. Please refer to the screenshot below.

 

Regards,

kristina