Question

I have a text field that can accept input of any kind. Based on the input, I need to make some fields hidden and others unhidden. However I want to put another condition within the first condition to check for the first 3 characters of the input value

Here is my code for the first condition:

$("#accountcodes").live("focusout",function(){
    var code = $(this).val();
    if(code>30000){ 
    alert("T1 to T4 codes needed");
    $(this).parents("tr").find('#T1').removeAttr('hidden','hidden');
    $(this).parents("tr").find('#T2').removeAttr('hidden','hidden');
    $(this).parents("tr").find('#T3').removeAttr('hidden','hidden');
    $(this).parents("tr").find('#T4').removeAttr('hidden','hidden');    

    }

    })

I want to put another condition within the if statement(if within an if) to check if the first 3 characters start with 310 or 311 then do something else e.g if a user inputs 31102, then another field is unhidden e.t.c I am not sure how to do that in Jquery. should I use regex? do I take the value of input and cut out the first three characters and check it?
Any help will be appreciated

Answer 1

So you just want to know about substr()? code.substr(0,3) would get you the first three characters.

Alternatively, you may want to use a regex to find 310 and 311 more easily, in which case you want code.match(/^31[01]/) instead.