Question

I want to use a jQuery/JavaScript function to validate the input of a textbox.

I have pairs of checkboxes like this:

<input type="text" id="MinMondayTxt" />
<input type="text" id="MondayTxt" />

this is for each day of the week (MinTuesdatTxt, MinWednesdayTxt…)

The Function is like this:

function ValidateTxt(TxtId){
}

It take the Id of a textbox as input. What I want to do is the following:

1) Check if the Id starts with “Min”

2) Get the corresponding textbox, by removing “Min” from the id. for example if we have MinMondayTxt I want to remove the “Min” in order to access the MondayTxt textbox

3) Compare the the values of the 2 textboxes (all values are numeric)

4) if MinMondayTxt > MondayTxt Alert the user

I am looking for help for step 1) and 2) : How can I check if the id starts with “Min” and how to get the corresponding textbox id (by removing the min)

Answer 1

You can use replace() method with the #id selector of jquery as below

function ValidateTxt(TxtId){ 
 var withoutminid = TxtId.replace(/^Min/, '');

 var withouminidval = $('#' + withoutminid).val();
 var minidval = $('#' + TxtId).val();
}