How do I automatically jump focus to next text field

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Hi, I have 3 text fields for the user to enter a phone number. Each one is set to max of each phone number segment - ( xxx xxx xxxx)3,3,4

How do I change this code to do this? It works by using the Tab key but I'd like it to jump when it hits the max character length:

<label for="P1" class="CstmFrmElmntLabel">Owner Phone</label>  
                
                <input name="P1" type="text" id="P1" size="6" class="CstmFrmElmntInputi29" onfocus="javascript:this.className = 'CstmFrmElmntInputi29NavSel';" onblur="javascript:this.className = 'CstmFrmElmntInputi29';" onmouseover="window.status = 'Owner\'s Phone Number: Area Code';
                        return true;" onmouseout="window.status = '';
                        return true;" title="Owner's Phone Number: Area Code" value="<? echo $P1; ?>" maxlength="3" onkeyup="AEV_set_tel_number('Phone_Number', 'P');"/>
                                                      
                <input name="P2" type="text" id="P2" size="6" class="CstmFrmElmntInputi29" onfocus="javascript:this.className = 'CstmFrmElmntInputi29NavSel';" onblur="javascript:this.className = 'CstmFrmElmntInputi29';" onmouseover="window.status = 'Owner\'s Phone Number: Prefix';
                        return true;" onmouseout="window.status = '';
                        return true;" title="Owner's Phone Number: Prefix" value="<? echo $P2; ?>" maxlength="3" onkeyup="AEV_set_tel_number('Phone_Number', 'P');" />
                                 
                <input name="P3" type="text" id="P3" size="8" class="CstmFrmElmntInputi34" onfocus="javascript:this.className = 'CstmFrmElmntInputi34NavSel';" onblur="javascript:this.className = 'CstmFrmElmntInputi34';" onmouseover="window.status = 'Owner\'s Phone Number: Suffix';
                        return true;" onmouseout="window.status = '';
                        return true;" title="Owner's Phone Number: Suffix" value="<? echo $P3; ?>" maxlength="4" onkeyup="AEV_set_tel_number('Phone_Number', 'P');" />
                        
                <input type="hidden" name="Phone Number" id="Phone_Number" value="<? echo $Phone; ?>" />
                <br />

What I have tried:

I'm not sure what to do yet. I'm pretty new to php and just learning and thought I'd tackle this in the code that exists already.

Posted 17-Jul-17 13:48pm

Noah Katz

Updated 17-Jul-17 23:15pm

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Kornfeld Eliyahu Peter · Answer 1 · 2017-07-17T23:15:00

There is nothing built in, but the actual code is fairly simple...
All you need is to add value to the maxlength[^] attribute and do some code...
A jQuery based example:

JavaScript

$( "input[maxlength]" ).keyup(function() {
    var maxLen = this.maxLength;
    var currentLen = this.value.length;

    if (maxLen === currentLen)
    {
        $(this).next().focus();
    } 
});