<!DOCTYPE html><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>string对象 </title><script type="text/javascript"> var mystr="Hello World wow o!" var i; for(i=0,i<=mystr.length,i++){ i=mystr.indexOf("o",i); document.write(i);} </script></head><body></body></html>
1 回答
慕数据5775487
TA贡献76条经验 获得超19个赞
for(i=0；i<=mystr.length；i++)是分号，不是逗号吧！
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>string对象 </title>
<script type="text/javascript">
var mystr="Hello World wow o!"
var i;
for(i=0;i<mystr.length;i++){
var a=mystr.indexOf("o",i);
if(mystr[i]=="o"){
document.write(a+'<br>');
}
}
</script>
</head>
<body>
</body>
</html>添加回答
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