JS乌龟吃鸡游戏

代码：

<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>乌龟游戏</title><script type="text/javascript">function move(obj){//乌龟图片高度var wuGui_height = 67;//乌龟图片宽度var wuGui_width  = 94;//公鸡图片高度var cock_height  = 73;//公鸡图片宽度var cock_width   = 76;var wuGui = document.getElementById("wugui");var wuGui_left = parseInt(wuGui.style.left.substring(0,wuGui.style.left.indexOf("p")));var wuGui_top = parseInt(wuGui.style.top.substring(0,wuGui.style.top.indexOf("p")));var input = document.getElementsByTagName("input");var cock = document.getElementById("cock");var cock_left = parseInt(cock.style.left.substring(0,cock.style.left.indexOf("p")));var cock_top = parseInt(cock.style.top.substring(0,cock.style.top.indexOf("p")));//乌龟和公鸡左上角的距离(纵向距离)var y = Math.abs(wuGui_top - cock_top);//乌龟和公鸡左上角的距离(横向距离)var x = Math.abs(wuGui_left - cock_left);//默认不重叠yy = 0;xx = 0;if(obj.value == "向上走"){wuGui_top -= 10;wuGui.style.top = wuGui_top + "px";}if(obj.value == "向左走"){wuGui_left -= 10;wuGui.style.left = wuGui_left + "px";}if(obj.value == "向右走"){wuGui_left += 10;wuGui.style.left = wuGui_left + "px";}if(obj.value == "向下走"){wuGui_top += 10;wuGui.style.top = wuGui_top + "px";}//碰撞if(wuGui_top < cock_top){if( y < wuGui_height){yy = 1;}}else {if (y < cock_height){yy = 1;}}if(wuGui_left < cock_left){if( x < wuGui_width){xx = 1;}}else {if (x < cock_width){xx = 1;}}if(xx && yy){alert("乌龟吃了鸡！");wuGui.style.top = "100px";wuGui.style.top = "120px";}}window.onload = function () {}</script>
</head>
<body>
<table border="1"><tr><td></td><td><input type="button" value="向上走" onclick="move(this)"/></td><td></td></tr><tr><td><input type="button" value="向左走" onclick="move(this)"/></td><td></td><td><input type="button" value="向右走" onclick="move(this)"/></td></tr><tr><td></td><td><input type="button" value="向下走" onclick="move(this)"/></td><td></td></tr>
</table>
<!--把乌龟放在一个div-->
<div id="wugui" style="position: absolute ;left:100px;top:120px;"><img src="1.bmp" border="1" alt=""/>
</div>
<!--公鸡图片div-->
<div id="cock" style="position:absolute;left:200px;top:200px;"><img src="2.bmp" border="1" alt=""/>
</div>
</body>
</html>