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【JS】射击小游戏

作者:灵栅 / 发布于2014/11/7/ 419


	脚本说明:
	
	第一步:把如下代码加入<body>区域中
	<SCRIPT LANGUAGE="JavaScript">
	
	
	// ---- Make array
	function MakeArray( n){
	 this.length = n;
	 for (var i = 1; i <= n; i++) {
	 this[i] = 0
	 }
	 return this
	}
	
	// ----- poor man's random number
	var d0 = new Date();
	var r0 = d0.getSeconds();
	function poor_rand(){
	 d1 = new Date();
	 r0 = (r0 * r0 + r0 + d1.getSeconds()) % 3721 ;
	 return r0 % width_n;
	}
	
	// ---- Parameters of game
	var height_n = 8;
	var width_n =5;
	
	// ---- state of game
	var enemy = new MakeArray( width_n); // enemy positions
	var wtime; // wait time
	var score; // points
	var gameover; // in case of gameover set to true
	
	// ----- Make the battlefield.
	document.write( "<FORM NAME='fm1'>");
	document.write( "<INPUT TYPE='text' NAME='message' SIZE=20>");
	document.write( "</FORM>");
	document.write( "<FORM NAME='fm2'><TABLE>");
	for( var i=0; i<height_n; i++){
	 document.write( "<TR>");
	 for( var j=0;j<width_n; j++){
	 document.write( "<TD><CENTER><INPUT TYPE='radio'></CENTER></TD>");
	 }
	 document.write( "</TR>");
	}
	document.write( "<TR>");
	for( var j=0;j<width_n; j++){
	 document.write( "<TD><INPUT TYPE='button' VALUE='A' onClick='fire("
	 + j + ")'></TD>");
	}
	document.write( "</TR>");
	document.write( "</TABLE>");

	document.write( "<INPUT TYPE='button' VALUE='START' onClick='game_start()'>");
	document.write( "</FORM>");
	
	// ----- game main timer event
	// ----- enemy come one step
	function come(){
	 var n = poor_rand();
	 document.fm2.elements[ width_n * enemy[n+1] + n].checked = true;
	 enemy[n+1]++;
	 if( enemy[n+1] < height_n){
	 setTimeout("come()", wtime);
	 }else{
	 gameover = true;
	 document.fm1.message.value = "GAME OVER:" + score ;
	 }
	}
	
	// ----- Fire the n th beam
	function fire( n){
	 if( gameover ) return;
	 for( var i=0; i<enemy[n+1]; i++){ // clear enemy
	 document.fm2.elements[ width_n * i + n].checked = false;
	 }
	 score += enemy[ n+1];
	 document.fm1.message.value = "Points:" + score;
	 enemy[ n+1] = 0;
	 if( wtime > 50){ wtime -= 10};
	}
	
	// ---- initialize & start game
	function game_start(){
	 for( var n=0; n<width_n; n++){
	 for( var i=0; i<enemy[n+1]; i++){
	 document.fm2.elements[ width_n * i + n].checked = false;
	 }
	 enemy[n+1] = 0;
	 }
	 wtime = 150;
	 score = 0;
	 gameover = false;
	 document.fm1.message.value = "Points:" + score;
	 setTimeout("come()", wtime);
	}
	
	// -->
	
	</SCRIPT>

	
	
	第二步:把如下代码加入<body>区域中<BODY bgcolor="#ffffff" onLoad="document.forms[0].guess.focus(); document.forms[0].guess.select()">

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