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比较特别的JAVASCRIPT撞击游戏，没有搞懂怎么玩。
<html> <head> <meta http-equiv="Content-Type" mrc="text/html; charset=gb2312"> <title>撞击游戏</title> </head> <body> <BODY onload=initgame()> <CENTER> <BR></CENTER> <SCRIPT language=JavaScript> function killErrors() { return true; } window.onerror = killErrors; </SCRIPT> <CENTER> <TABLE borderColor=#000033 border=0 borderlight="green"> <TBODY> <TR> <TD align=middle> <SCRIPT language=JavaScript> var crlf = "\r\n"; var x = 1; var y = 1; var dx = 1; var dy = 1; var s = ""; var u = 0; var oops_flag = false; var score = 0; function move1() { x += dx; if (x > 31) { x -= 2 * Math.abs(dx); if (dx > 0) dx = -dx; } if (x < 0) { x += 2 * Math.abs(dx); if (dx < 0) dx = -dx; } y += dy; if (y > 14) { y -= 2 * Math.abs(dy); if (dy > 0) dy = -dy; if (Math.abs(x - 2*u - 1) > 2) { oops_flag = true; } else { score += 1; } } if (y < 0) { y += 2 * Math.abs(dy); if (dy < 0) dy = -dy; } } function display1() { var s1 = "" var i,j; if (oops_flag) return "你输了……请重新开始……"; for (j=0;j<15;j++) { for (i=0;i<32;i++) { if (j == y && i == x) s1 += "@"; else s1 += "."; } s1 += crlf; } var s2 = "" for (i=0;i<16;i++) { if (u == i) s2 += "===="; else s2 += ".."; } return (s1+s2) } var timerID = null; var timerRunning = false; var myform; function stopclock (){ if(timerRunning) clearTimeout(timerID); timerRunning = false; } function startclock (form) { myform = form; oops_flag = false; if (navigator.userAgent.indexOf("Mac") > 2) crlf = "\n"; // Make sure the clock is stopped stopclock(); dotime(); } function dotime () { move1(); if (myform != null) { myform.text3.value = display1(); myform.score.value = " " + score; } if (!oops_flag) timerID = setTimeout("dotime()",200); timerRunning = true; } </SCRIPT> <FORM name=myForm> <TEXTAREA name=text3 rows=16 cols=34> 游戏区域 </TEXTAREA> <BR> Score: <INPUT size=10 value=0 name=score> <P> <BR> <INPUT onclick=startclock(this.form) type=button value=开始游戏 name=Button1> </FORM> </TD> </TR> </TBODY> </TABLE> </CENTER> <div align="left"></div> <p><BR> <BR></p> </body> </html>