<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>jQuery实现购物车多物品数量的加减+总价计算</title> <script type="text/javascript" src="http://code.jquery.com/jquery-1.6.1.min.js"></script> <script> $(function(){ $(".add").click(function(){ var t=$(this).parent().find('input[class*=text_box]'); t.val(parseInt(t.val())+1) setTotal(); }) $(".min").click(function(){ var t=$(this).parent().find('input[class*=text_box]'); t.val(parseInt(t.val())-1) if(parseInt(t.val())<0){ t.val(0); } setTotal(); }) function setTotal(){ var s=0; $("#tab td").each(function(){ s+=parseInt($(this).find('input[class*=text_box]').val())*parseFloat($(this).find('span[class*=price]').text()); }); $("#total").html(s.toFixed(2)); } setTotal(); }) </script> </head> <body> <table id="tab"> <tr> <td> <span>单价:</span><span class="price">1.50</span> <input class="min" name="" type="button" value="-" /> <input class="text_box" name="" type="text" value="1" /> <input class="add" name="" type="button" value="+" /> </td> </tr> <tr> <td> <span>单价:</span><span class="price">3.95</span> <input class="min" name="" type="button" value="-" /> <input class="text_box" name="" type="text" value="1" /> <input class="add" name="" type="button" value="+" /> </td> </tr> </table> <p>总价：<label id="total"></label></p> </body> </html>