网上购物车购物数量加减效果
<script>
    function $(e) {
        return document.getElementById(e);
    }
    function abdc() {
        var sl = $('shuliang').value;
        sl = parseInt(sl) + 1;
        $('shuliang').value = sl;
        $('ccc').innerHTML = sl * 150;
    }
    function abdce() {
        var sl = $('shuliang').value;
        if (sl > 0) {
            sl = parseInt(sl) - 1;
        }
        $('shuliang').value = sl;
        $('ccc').innerHTML = sl * 150;
    }
</script>
<a href="javascript:abdce();">-</a>
<input id="shuliang" value="1" />
<a href="javascript:abdc();">+</a>
<div id="ccc">
    0</div>
<p style="color: #555; line-height: 150%; text-align: center; font-size: 12px; font-family: Microsoft YaHei">
    <strong>网上购物车购物数量加减效果</strong>&nbsp;&nbsp;<a href="http://www.funet8.com" target="_blank">好玩吧整理</a>
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</p>
<p style="color: #555; line-height: 150%; text-align: center; font-family: Microsoft YaHei;
    font-size: 12px;">
    转载请注明出处。 本代码仅限于学习交流，请勿用于商业用途!
</p>