求助~~谁来帮我挑挑错 我是在是找不到错误 不知道怎么办了
<!---------------------------->
<!-- 5_2.html -->
<!---------------------------->
<html>
<head>
<title> </title>
<script type= "text/javascript " src= "5_2.js "> </script>
</head>
<body onload= "init() ">
<script type= "text/javascript " src= "5_2.js "> </script>
<p>
<br> 2 down 4 left 6 right 8 up </P>
<div id= "blockdiv " style= "position:absolute;left:50;top:85;width:40; ">
<img src= "3.gif " width= "40 " height= "40 " border= "0 "> </div> </body>
</html>
<!---------------------------->
<!-- 5_2.js -->
<!---------------------------->
function init()
{
block=blockdiv.style;
block.xpos=parseInt(block.left)
block.ypos=parseInt(block.top)
block.activeleft=false;
block.activeright=false;
block.activeup=false;
block.activedown=false;
document.onkeydown=keyDown;
document.onkeyup=keyUp;
}
function keyDown(e)
{{var ieKey=event.keyCode;var nKey=0;}
if((ieKey==50) && !block.activeleft){
block.activeleft=true;
block.activeright=false;
slideleft()
}
if((ieKey==52) && !block.activeright){
block.activeright=true;
block.activeleft=false;
slideright()
}
if((ieKey==54) && !block.activeup){
block.activeup=true;
block.activedown=false;
slideup()
}
if((ieKey==56) && !block.activedown){
block.activedown=true;
block.activeup=false;
slidedown()
}
}
function keyUp(e)
{{var ieKey=event.keyCode;}
if(iekey==50) block.activeleft=false;
if(iekey==52) block.activeright=false;
if(iekey==54) block.activeup=false;
if(iekey==56) block.activedown=false;
}
function slideleft()
{
if(block.activeleft){
block.xpos -= 5;
block.left=block.xpos;
status = "x: " + block.xpos + "y: " + block.ypos;
setTimeout( "slideleft() ",20);
}
}
function slideright()
{
if(block.activeright){
block.xpos+=5;
block.left=block.xpos;
status = "x: " + block.xpos + "y: " + block.ypos;
setTimeout( "slideright() ",20);
}
}
function slideup()
{
if(block.activeup){
block.ypos-=5;
block.top=block.ypos;
status = "x: " + block.xpos + "y: " + block.ypos;
setTimeout( "slideup() ",20);
}
}
function slidedown()
{
if(block.activedown){
block.ypos+=5;
block.top=block.ypos;
status = "x: " + block.xpos + "y: " + block.ypos;
setTimeout( "slidedown() ",20);
}
}
上面的是一个键盘控制图片移动的js代码~~
[解决办法]
function keyUp(e)
{
block.activeleft=false;
block.activeright=false;
block.activeup=false;
block.activedown=false;
}
你的keyUp函数的if语句根本不会执行。 把if语句去掉即可。 键都按起来了。 怎么可能还会和键按下去的键代码一样呢？而且这里根本用不着if。 document.onkeyup 就已经判断键弹起了。
[解决办法]
function keyUp(e)
{{var ieKey=event.keyCode;}//这里是不是有问题啊....
if(iekey==50) block.activeleft=false;
if(iekey==52) block.activeright=false;
if(iekey==54) block.activeup=false;
if(iekey==56) block.activedown=false;
}
还有KeyDown