代码如下：
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> <style> *{ margin: 0; padding: 0; } body{ overflow-y: auto; } ul{ margin-top: 20px; border-top: 1px solid #666; } h1{ width: 500px; margin: 0 auto; color: deeppink; height: 100px; line-height: 100px; } li{ list-style: none; padding: 15px 0px 15px 60px; border-bottom:1px solid #ccc; font-size: 0px; line-height: 30px; /*height: 60px;*/ } input[type=button],li strong,li em,li span,li div{ height: 30px; font-size: 20px; line-height: 30px; text-align: center; } input[type=button],li strong { width: 60px; } li span,li em{ width: 80px; background: pink; } li div{ width: 100px; } li strong,li span,li em,li div{ display: inline-block; } </style> <script> window.onload=function(){ var oUl=document.getElementById(‘list‘); var aLi=oUl.getElementsByTagName(‘li‘); for(var i=0;i<aLi.length;i++){ fn1(aLi[i]); } function fn1(aLi){ var aBtn=aLi.getElementsByTagName(‘input‘); var aStrong=aLi.getElementsByTagName(‘strong‘)[0]; var aEm=aLi.getElementsByTagName(‘em‘)[0]; var aSpan=aLi.getElementsByTagName(‘span‘)[0]; var num=Number(aStrong.innerHTML); //aStrong.innerHTML=‘0‘ var price=parseFloat(aEm.innerHTML);//aEm.innerHTML=‘12.9元‘ aBtn[0].onclick=function(){ if(num>0) { num--; aStrong.innerHTML=num; aSpan.innerHTML=(num*price).toFixed(1)+‘元‘ } } aBtn[1].onclick=function(){ num++; aStrong.innerHTML=num; aSpan.innerHTML=(num*price).toFixed(1)+‘元‘ } } } </script> </head> <body> <h1>点点看，仿购物车+ -效果</h1> <ul id="list"> <li> <input type="button" value="-" /> <strong>0</strong> <input type="button" value="+" /> <div class="s1">单价:</div><em>12.9元</em> <div class="s1">共计：</div><span>0</span> </li> <li> <input type="button" value="-" /> <strong>0</strong> <input type="button" value="+" /> <div class="s1">单价:</div><em>45.7元</em> <div class="s1">共计：</div><span>0</span> </li> <li> <input type="button" value="-" /> <strong>0</strong> <input type="button" value="+" /> <div class="s1">单价:</div><em>67.5元</em> <div class="s1">共计：</div><span>0</span> </li> <li> <input type="button" value="-" /> <strong>0</strong> <input type="button" value="+" /> <div class="s1">单价:</div><em>14.7元</em> <div class="s1">共计：</div><span>0</span> </li> <li> <input type="button" value="-" /> <strong>0</strong> <input type="button" value="+" /> <div class="s1">单价:</div><em>45.6元</em> <div class="s1">共计：</div><span>0</span> </li> <li> <input type="button" value="-" /> <strong>0</strong> <input type="button" value="+" /> <div class="s1">单价:</div><em>32.4元</em> <div class="s1">共计：</div><span>0</span> </li> </ul> </body> </html>
