set field max length , but in form layout , it still can input a number of data

[zhihong]

hi experts,

I set "Date" max length is 4, but in form layout it can input 15 ,why?

[Harsh Vardhan]

you can make it read only if anyone try to enter more than 4 integer value. this is what you want ?

[zhihong]

better is when more than 4 integer value, not editable. if it impossible, just alert

[Harsh Vardhan]

then whats wrong with the script which i have added. if you will enter more than 4 number it will instantly read only. 

[Harsh Vardhan]

this is what  i have . 

function onChange(control, oldValue, newValue, isLoading, isTemplate) {
	if (isLoading || newValue === '') {
		return;
	}

	//Type appropriate comment here, and begin script below
	var date = g_form.getValue('u_num'); 
	alert(date.length);
	if(date.length >4) {
alert(' you can not add more than 4 number')
		g_form.setReadOnly('u_num',true);

	}

}

[zhihong]

Thanks for your help.

>g_form.setReadOnly('u_num',true);

I think maybe it will be useful for me one day.