1
我只是在学习javascript，我遇到了一些麻烦。我正在做一个选择你自己的冒险游戏，你会经历一个迷宫。有图片显示你正在发生什么。每做出决定后，照片都会改变。在输入左侧或右侧后更改图片时遇到问题。我一直在获取Uncaught TypeError：每次尝试加载图片时都无法设置属性'src'的空错误消息。 Java的说，这个问题是在66号线Uncaught TypeError：无法设置null的属性'src'...选择你自己的冒险
这里存在的是我的代码：
<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>Brian.Bosco-Hazey Maze Adventure</title>
<script type="application/javascript">
var flag;
var output;
var name;
var n1 = "what is your name?"
var s1 = "You wake up in a spooky maze. You must find your way out or this place will become your grave. You can go <b>Left</b> or <b>Right</b>?";
var s2 = "You come across a wizard at a fork in the maze. He gives you a magic sword to defend yourself with. You can either go <b>Left</b> or <b>Right</b>?";
var e1 = "You encounter a monster. you attempt to escape, but it pounces on you and tears off your flesh. You have died. GAME OVER. Type restart to try again";
var e2 = "You come across a dead end, looks like you have to go back the way you came. When you turn around you step on a trap on the floor and the whole tunnel collapses on you. You did not survive. Please type restart to try again."
var e3 = "While walking down this long hallway, you come across a giant monster guarding the exit door. You take the sword the wizard gave you and you slay the beast. You go through the door and exit the maze. Congradulations you have beaten the game! Type restart to play again. ";
var done = "What are you doing? You are still dead. Type restart to start again";
var myImage;
var newImage;
function init(){
\t output = document.getElementById('output');
\t output.innerHTML="";
\t flag="n1";
\t texter(n1);
\t name = "";
\t document.body.style.background="white";
}
function texter(newText){
\t console.log(newText+" from texter");
\t var oldText = document.getElementById('output').innerHTML;
\t document.getElementById('output').innerHTML= newText;//+" "+oldText;
}
function Imger(newImage){
\t document.getElementById('img1').src = newImage;
\t document.getElementById('img2').src = newImage;
}
function game(){
\t var input = document.getElementById('input').value;
\t console.log("the input is "+input);
\t if(input=="restart"){
\t \t init();
\t }else{
\t \t if(flag=="n1"){
\t \t \t name = input;
\t \t \t flag="s1";
\t \t \t texter("hello "+name+" "+s1);
\t \t \t document.getElementById('img1').src = "hooded man.jpg";
\t \t \t output.style.color="blue";
\t \t }else if(flag=="s1"){
\t \t \t //ask c1
\t \t \t if(input=="right"){
\t \t \t \t flag="s2";
\t \t \t \t texter(s2);
\t \t \t \t
\t \t \t \t \t
\t \t \t \t document.body.style.background="green";
\t \t \t }else if(input=="left"){
\t \t \t \t texter(e1);
\t \t \t \t flag ="e1";
\t \t \t \t document.getElementById('img2').src = "last scene.jpg";
\t \t \t
\t \t \t }else{
\t \t \t \t texter("error");
\t \t \t }
\t \t }else if(flag=="s2"){
\t \t \t //ask c2
\t \t \t if(input=="right"){
\t \t \t \t flag="e2";
\t \t \t \t texter(e2);
\t \t \t \t
\t \t \t \t document.body.style.background="red";
\t \t \t }else if(input=="left"){
\t \t \t \t texter(e3);
\t \t \t \t flag ="e3";
\t \t \t \t document.body.style.background="yellow";
\t \t \t }else{
\t \t \t \t texter("error");
\t \t \t }
\t \t }else if(flag=="e1"){
\t \t \t //e1
\t \t \t texter(done);
\t \t }else if(flag=="e2"){
\t \t \t //e2
\t \t \t texter(done);
\t \t }else if(flag=="e3"){
\t \t \t //e3
\t \t \t texter(done);
\t \t }
\t }
}
</script>
</head>
<body onLoad="init()">
<img src="start.jpg" id="img1" width="500" height="500">
<p id="output">this is the start text</p>
<input type="text" id="input">
<input type="button" value="submit" onClick="game()" ">
</body>
</html>
你使用'getElementById（'img2'）'但你没有任何带有id的元素'img2' – 2014-09-25 19:25:38