php购物车中数量添加器 ajax处理

TianJia.php主页

<!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">
<script type="text/javascript" src="Script/jquery-1.7.1.min.js"></script>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>

<body>
<input id="jian" value="-" type="button" />
<input id="text" value="1" style="20px;" type="text" />
<input id="jia" value="+" type="button" />
</body>
<script type="text/jscript">
$(document).ready(function(e) {
	//数量增加按钮
    $("#jia").click(function(e) {
		var text1= $("#text").val();
        $.ajax({
			url:"TianJiaDo1.php",
			data:{text1:text1},
			dataType:"TEXT",
			type:"POST",
			success: function(data)
			{
				$("#text").val(data);
			}
			
		});
		//数量减少按钮
		$("#jian").click(function(e) {
            var text2=$("#text").val();
			$.ajax({
				url:"TianJiaDo2.php",
				data:{text2:text2},
				dataType:"TEXT",
				type:"POST",
				success: function(data)
				{
					$("#text").val(data);
				}
			})
        });
    });
});
</script>
</html>

TianJia.Do1数量添加处理页面

<?php
$zhi= $_POST["text1"];
echo $zhi=$zhi+1;
?>

TianJia.Do2数量减少页面

<?php
$text2=$_POST["text2"];
$text2;
if($text2>2)
{
 echo $text2=$text2-1;	
}
else{echo 1;}
?>