我写的一个打字游戏为什么setInterval不能执行move方法呢？
代码如下：
HTMLCode:
<html>
<head>
<title>打字</title>
<link type="text/css" href="./css/objMain.css" rel="stylesheet">
<script src="./js/objClickWords.js"></script>
</head>
<body onkeypress="makeWordFromKeyBoard()">
<div id="outer">
<div id="inner_top">
<!--主显示区域即字母下降区域-->
</div>
<div id="inner_bottom">
<!--状态和控制面板区域-->
分数：<span id="cores">0</span>
膣度：<select onchange="changeGameLevel()" id="hard">
<option value="700">7</option>
<option value="600">6</option>
<option value="500">5</option>
<option value="400">4</option>
<option value="300">3</option>
<option value="200">2</option>
<option value="100">1</option>
</select>
运行状态：<span id="run_status">停止中.......</span>
<button onclick="startGameFromKeyBoard()">begin</button>
<button onclick="pauseGame()">pause</button>
</div>
</div>
</body>
</html>
jsCode:
//盒子或容器
function Box(boxId,boxName){
var B_this=this;
B_this.id=boxId;
B_this.bName=boxName;
B_this.boxSize;//容器大小
B_this.isExist=false;//盒子是否在引擎上
B_this.htmlNodeObj;
{
//alert("999");
if(B_this.id==null||B_this.id==undefined){
alert("盒子参数未初始化1！");
return;
}
if(B_this.bName==null||B_this.bName==undefined){
alert("盒子参数未初始化2！");
return;
}
B_this.htmlNodeObj=document.createElement("label");
B_this.htmlNodeObj.id=B_this.id;
B_this.htmlNodeObj.innerHTML=String.fromCharCode(B_this.bName);
B_this.htmlNodeObj.style.position="absolute";
B_this.htmlNodeObj.style.top=0+"px";
}
B_this.getHtmlNodeObj=function(){//获得label节点对象
return B_this.htmlNodeObj;
}
B_this.setBName=function(bxName){//为盒子命名
B_this.bName=bxName;
}
B_this.getBName=function(){//获得盒子的名字
return B_this.bName;
}
B_this.setId=function(bId){//给盒子一个id
B_this.id=bId;
}
B_this.getId=function(){//获得盒子的id
return B_this.id;
}
B_this.getBoxSize=function(){//获得盒子的大小
return B_this.boxSize;