                        課程
                    
                        /前端開發
                        
                            /jQuery
                        
                        /jQuery基礎課程

求大神看下為什么不行？

<!DOCTYPE?html>
<html>
????<head>
????????<meta?http-equiv="Content-Type"?content="text/html;?charset=utf-8"?/>
????????<script?src="http://libs.baidu.com/jquery/1.9.0/jquery.js"?type="text/javascript"></script>>
????????<title>jQuery動畫特效</title>
????????<style?type="text/css">
????????????#pt{
????????????	margin:200px;
????????????	background:?red;
????????????	width:?100px;
????????????	height:?100px;
????????????}
????????????#ipt{
????????????	position:?absolute;
????????????	top:?0;
????????????	left:?10;
????????????}
????????</style>
????</head>
????
????<body>
????	<div?id="pt"></div>
????	<div?id="ipt">
	????????<input?type="button"?value="向左"?id="left"?/>
	????????<input?type="button"?value="向右"?id="right"?/>
????????</div>
????????
????????<script?type="text/javascript">
????????$("#left").bind("click",function(){
			
			$("#pt").animate({left:?"+=50px"},2000)
		})
		$("#right").bind("click",function(){
			
			$("#pt").animate({left:"-=50px"},2000)
		})
		
????????</script>
????</body>
</html>