Jquery快速实现数量加减
<!-- 快速实现数量加减 -->
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script>
<script>
$(document).ready(function(){
//获得文本框对象
var t = $("#text_box");
//初始化数量为1,并失效减
$('#min').attr('disabled',true);
//数量增加操作
$("#add").click(function(){
// 给获取的val加上绝对值，避免出现负数
t.val(Math.abs(parseInt(t.val()))+1);
if (parseInt(t.val())!=1){
$('#min').attr('disabled',false);
};
})
//数量减少操作
$("#min").click(function(){
t.val(Math.abs(parseInt(t.val()))-1);
if (parseInt(t.val())==1){
$('#min').attr('disabled',true);
};
})
});
</script>
</head>
<body>
<input id="min" name="" type="button" value="-" />
<input id="text_box" name="" type="text" value="1" style="width:30px;text-align: center"/>
<input id="add" name="" type="button" value="+" />
</body>
</html>
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