Question

js 左取3个字符的函数

在线等 效果跟vb的left（string,n）

Answer 1

function SubstringDemo(){
var ss; // 声明变量。
var s = "The rain in Spain falls mainly in the plain..";
ss = s.substring(12, 17); // 取子字符串。
return(ss); // 返回子字符串。
}

Answer 2

<script>
var ss;
var s = "Therain in Spain falls mainly in the plain..";
ss = s.substr(0, 3);
alert(ss);
</script>