php - Pass / echo DIV ID (letter) into input value based on another input value (Number between 0-100)

one text

I have form that I created that is sending specific data to a database to be retrieved on another page. I manually have to enter field(s) (e.g. nameme, pointme, soundme) inputs in to achieve the purpose, but want to trim things down by taking the POINTME value (e.g. 0-100), and based on that value adding a letter (e.g. R 36-60, K 16-35, M 1-15 or W 0) to the input field (SOUNDME) that will pass along to the database.

I'm not too savvy at this, and have only achieved at how to make the values populate based on POINTME numbers. If anyone can help me, that would be AWESOME!! Thanks.

HTML:
<div class="row">
<!-- contestant 1 -->
<div class="col-sm-3">
<input type="text" name="nameme" value="No Value">
</div>
<div class="col-sm-3">
<input type="text" name="pointme" id ="v0" onkeyup="calculate()" class="adj" maxlength="2"     value="0">
</div>
<div class="col-sm-3">
<input type="text" name="soundme" class="adj" maxlength="1" value="0">
</div>
</div>


<input type="text" id="myTextField" onblur="change()"/>

<p id="HighPoints" style="display:none;" >R</p>
<p id="MediumPoints" style="display:none;" >K</p>
<p id="LowPoints" style="display:none;" >M</p>
<p id="NoPoints" style="display:none;" >W</p>





jQuery/Javascript:

jQuery(document).ready(function () {
jQuery("#myTextField").mouseleave(function () {
        var myTextbox = document.getElementById('myTextField').value;
        var button = document.getElementById('byBtn');

    if (parseFloat(myTextbox) == 0) { // W
        $('#NoPoints').css("display", "block");
        $('#LowPoints').css("display", "none");
        $('#MediumPoints').css("display", "none");
        $('#HighPoints').css("display", "none");    
    } else if (parseFloat(myTextbox) >= 1 && parseFloat(myTextbox) <= 15) { // M
        $('#NoPoints').css("display", "none");
        $('#LowPoints').css("display", "block");
        $('#MediumPoints').css("display", "none");
        $('#HighPoints').css("display", "none");
    } else if (parseFloat(myTextbox) >= 16 && parseFloat(myTextbox) <= 35) { // K
        $('#NoPoints').css("display", "none");
        $('#LowPoints').css("display", "none");
        $('#MediumPoints').css("display", "block");
        $('#HighPoints').css("display", "none");
    } else if (parseFloat(myTextbox) >= 36 && parseFloat(myTextbox) <= 60) { // R
        $('#NoPoints').css("display", "none");
        $('#LowPoints').css("display", "none");
        $('#MediumPoints').css("display", "none");
        $('#HighPoints').css("display", "block");
    } else if (parseFloat(myTextbox) >= 61) { // Error
        alert("Value Points Exceeds Level");
    } else { // NO INPUT
        $('#NoPoints').css("display", "none");
        $('#LowPoints').css("display", "none");
        $('#MediumPoints').css("display", "none");
        $('#HighPoints').css("display", "none");
    }
});

});