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<!doctype html>

<?php
//首先在這里寫好相關(guān)的調(diào)用代碼


$coin = 1280;
$money = 1121;
$coinsale = $coin / 100;
if ( $_POST[ "coin" ] != 0 ) {
    $money -= $coinsale;

}

?>
<html>

<head>
    <meta charset="utf-8">
    <title>無標(biāo)題文檔</title>
</head>



<body>

    <form id="form1" name="form1" action="test.php" method="post">
        <input id="coin" name="coin" type="checkbox" value="<?php echo($coinsale)?>" onclick="checkboxOnclick(this)">土特幣

        <input id="sale" type="hidden" value="<?php echo($money)?>">
        <input id="asd" type="hidden" value="<?php echo($coinsale)?>">
        <p id="npay" style="width:100%;height:95px;line-height:50px;font-weight:800;font-size:14px;color:red; text-align:center">
            ￥
            <?php echo $money; ?>
        </p>
        <input type="hidden" id="goodsmoney" name="goodsmoney" value="<?php echo $money; ?>"/>
    </form>

</body>
<script>
    

            function checkboxOnclick( checkbox ) {

                var goods = document.getElementById( "npay" );
                var m = document.getElementById( "sale" ).value;
                var c = document.getElementById( "asd" ).value;
                var f = document.getElementById( "form1" );
                if ( checkbox.checked == true ) {

                    m -= c;
                    goods.innerHTML = "￥" + m;
                    f.submit();
                } else {
                    goods.innerHTML = "￥" + m;
                    
                }
            }
    <!--$.("input[type='checkbox']:checked")-->
        
    
</script>

</html>

希望能給個小例子，具體實(shí)現(xiàn)不太會，php不太熟悉。謝謝大家：）