截取字符串中间几位或后几位的函数是什么?

[nowokcom]

[ahui_net]

mid (a,b,c)

a:字符串的开始位置，如：1，45，343
b:字符串
c:从a位置开始取多少个字符

如： abc=mid(5,"1234567890",4)
abc就等于5678

[kickken]

<script language=javascript>
<!--
function cutstring()
{
var mystr
mystr = "Hello!"
mystr = mystr.subString(2,5)
// mystr = "llo"
}
//-->
</script>

[kickken]

错了 substring 都是小写
<script language=javascript>
<!--
function cutstring()
{
var mystr
mystr = "Hello!"
mystr = mystr.substring(2,5)
// mystr = "llo"
}
//-->
</script>

[karma]

in javascript, you use substring() or substr(), for example,
var str = "1234567890";

to get the "567", try

str.substr(4,3) or str.substring(4,7);

to get "890", try
str.substr(7) or str.substring(7)