小编bro*_*roc的帖子

问题:如何从id中提取元素？

HTML:

<div class="product">
    <p id="price1">99,00</p>
</div>
<div class="product">
    <p id="price2">101,00</p>
</div>
<div class="product">
    <p id="price3">50,00</p>
</div>
<div class="product">
    <p id="price4">1,99</p>
</div>
<div class="product">
    <p id="price5">2,01</p>
</div>

JS:

var sumPrice = 0;

$(".product").click(function() {    

    if ( i = 1) sumPrice += parseFloat($( "#price" + i ).text())
    else if ( i = 2) sumPrice += parseFloat($( "#price" + i ).text())
    else if ( i = 3) sumPrice += parseFloat($( "#price" + i ).text())
    else if ( i = 4) sumPrice …