World of Tanks - Crew Skill Calculator

<!DOCTYPE html>

<html>

<head>

<title>Crew Skill Calculator</title>

</head>

<body>


<style>
* {
  box-sizing: border-box;
}

/* Create two equal columns that floats next to each other */
.column {
  float: left;
  width: 50%;
  padding: 10px;
}

/* Clear floats after the columns */
.row:after {
  content: "";
  display: table;
  clear: both;
}
</style>


<script>

function CalcIncrease( cpcent, cskills, wpcent, wskills ) {


    var keep_trying = 0, y, xp_req = 0, xp;


    if ( cpcent == 100 ) {
        cskills++;
        cpcent = 0;
    }
    if ( wpcent == 100 ) {
        wskills++;
        wpcent = 0;
    }

    if ( ( wskills == cskills )  && ( wpcent > cpcent ) ) {
        keep_trying = 1;
    } else if ( wskills > cskills ) {
        keep_trying = 1;
    }


    while ( keep_trying == 1 ) {

        y = cskills + 1;

        xp_req = xp_req + ( ( 2 ** y ) * 25 * ( 100 ** ( cpcent / 100 ) ) );

        cpcent++;
        if ( cpcent == 100 ) {
            cskills++;
            cpcent = 0;
        }

        if ( ( wskills == cskills )  && ( wpcent == cpcent ) ) {
            keep_trying = 0;
        }
    }


    xpd = Math.floor( xp_req );

    if ( xpd != xp_req ) {
        xpd++;
    }

    if ( cskills > 1 ) {
        document.getElementById("noskills").innerHTML = "After gaining " + xpd.toLocaleString() + " experience, you will have " + (cskills - 1) + " completed skill(s) and be at " + cpcent + " percent in the next.";

    } else if ( cskills == 1 ) {
        document.getElementById("noskills").innerHTML = "After gaining " + xpd.toLocaleString() + " experience, you will have 100% in your major qualifaction and be at " + cpcent + " percent in your first skill.";


    } else {
        document.getElementById("noskills").innerHTML = "After gaining " + xpd.toLocaleString() + " experience, you will have " + cpcent + " percent in the major qualification.";


    }


    return " ";

}


</script>


<h1>Calculate the required experience to attain a certain crew skill</h1>


<form onsubmit="return false" onchange="x.value=CalcIncrease(parseInt(a.value), parseInt(noperks.value), parseInt(b.value), parseInt(nowanted.value))">

    <div class="row">
        <div class="column" style="background-color:#aaa;">
            <h2>My crew has ...</h2>

            <input type="number" id="a" step="1" name="a" min="0" max="100" value="90" > percent in their <br>

            <input type="radio" name="noperks" value="0" checked> major qualification.<br>

            <input type="radio" name="noperks" value="1" > first skill.<br>

            <input type="radio" name="noperks" value="2"> second skill.<br>

            <input type="radio" name="noperks" value="3"> third skill.<br>

            <input type="radio" name="noperks" value="4"> fourth skill.<br>

            <input type="radio" name="noperks" value="5"> fifth skill.<br>

            <input type="radio" name="noperks" value="6"> sixth skill.<br>

            <input type="radio" name="noperks" value="7"> seventh skill.<br><br><br>


        </div>
        <div class="column" style="background-color:#bbb;">
            <h2>I want to get them to ...</h2>
            <input type="number" id="b" step="1" name="b" min="0" max="100" value="100" > percent in their <br>

            <input type="radio" name="nowanted" value="0" checked> major qualifiaction.<br>

            <input type="radio" name="nowanted" value="1" > first skill (and 100% in their major qualification).<br>

            <input type="radio" name="nowanted" value="2"> second skill.<br>

            <input type="radio" name="nowanted" value="3"> third skill.<br>

            <input type="radio" name="nowanted" value="4"> fourth skill.<br>

            <input type="radio" name="nowanted" value="5"> fifth skill.<br>

            <input type="radio" name="nowanted" value="6"> sixth skill.<br>

            <input type="radio" name="nowanted" value="7"> seventh skill.<br><br><br>

        </div>
    </div>
    <output name="x"></output>

</form>

<p id="noskills" > </p>


<p>Note that 0-skill BIA crews are not accounted for in the calculation.  In those cases, reduce the number of skills, have and desired, by 1.</p>
</body>

</html>