為什么加了第二句就出不來(lái)結(jié)果呢
謝謝幫助我的同學(xué)們！
夜蝶翱翔
2016-12-28
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2017-08-22
倆問(wèn)題，首先少個(gè)），還有就是如果你想找空格符，應(yīng)該是“ ”，而不是“”，用我下面的能行
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>string對(duì)象</title>
<script type="text/javascript">
var mystr="Hello World!"
document.write(mystr.substring(mystr.indexOf("W"),mystr.length) + "<br />");
document.write(mystr.substring(1,mystr.indexOf(" ",0)));
</script>
</head>
<body>
</body>
</html>
2017-01-08
document.write(mystr.substring(1,mystr.indexOf("",0));
這段結(jié)尾缺了‘）’，導(dǎo)致結(jié)果輸不出來(lái)
2016-12-28
輸出第二行少了“）”
2016-12-28
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>string對(duì)象</title>
<script type="text/javascript">
var mystr="Hello World!"
document.write(mystr.substring(mystr.indexOf("W"),mystr.length) + "<br />");
document.write(mystr.substring(1,mystr.indexOf("",0)));
</script>
</head>
<body>
</body>
</html>