Dom中利用setInterval实现走马灯问题
要实现功能：实现标题栏走马灯效果，按【向左】按钮就向左连续滚动，按【向右】按钮就像有连续滚动。
自己写的代码：
[code=HTML][/code]<head>
<title>新学期欢迎新同学！！</title>
<script type="text/javascript">
function zuozou() {
var title = document.title;
var f = title.charAt(0);
var q = title.substring(1, title.length);
document.title = q + f;
}
function youzou() {
var title = document.title;
var f = title.charAt(9);
var q = title.substring(0, title.length - 1);
document.title = f+q;
}
var setinterval1 = setInterval("zuozou()", 2000);
var setinterval2 = setInterval("youzou()", 2000);
</script>
</head>
<body>
<input type="button" value="左滚" onclick="clearInterval(setinterval2);setinterval1" />
<input type="button" value="右滚" onclick="clearInterval(setinterval1);setinterval2" />
</body>
[解决办法]
<head> <title>新学期欢迎新同学！！</title> <script type="text/javascript"> function zuozou() { var title = document.title; var f = title.charAt(0); var q = title.substring(1, title.length); document.title = q + f; } function youzou() { var title = document.title; var f = title.charAt(9); var q = title.substring(0, title.length - 1); document.title = f+q; }var setinterval1 =nullvar setinterval2 =nullfunction scroll(m){if(m==1){if(setinterval2)clearInterval(setinterval2)setinterval1=setInterval("zuozou()", 200);}else{if(setinterval1)clearInterval(setinterval1)setinterval2=setInterval("youzou()", 200);}} </script></head><body><input type="button" value="左滚" onclick="scroll(1)" /><input type="button" value="右滚" onclick="scroll(2)" /></body>