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jQuery实现购物车物品数量的加减

<!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>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>jQuery实现购物车物品数量的加减</title>

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js"></script>

<script>

$(function(){

var t = $("#text_box");

$("#add").click(function(){

t.val(parseInt(t.val())+1)

setTotal();

})

$("#min").click(function(){

t.val(parseInt(t.val())-1)

setTotal();

})

function setTotal(){

$("#total").html((parseInt(t.val())*3.95).toFixed(2));

}

setTotal();

})

</script>

</head>

<body>

<p>单价:3.95</p>

<input id="min" name="" type="button" value="http://www.mamicode.com/-" />

<input id="text_box" name="" type="text" value="http://www.mamicode.com/4" />

<input id="add" name="" type="button" value="http://www.mamicode.com/+" />

<p>总价:<label id="total"></label></p>

</body>

</html>