Left函数从给定输入字符串的左侧返回指定数量的字符。
Left(String, Length)
<!DOCTYPE html>
<html>
<body>
<script language = "vbscript" type = "text/vbscript">
var = "Microsoft VBScript"
document.write("Line 1 : " & Left(var,2) & "<br />")
var = "MS VBSCRIPT"
document.write("Line 2 : " & Left(var,5) & "<br />")
var = "microsoft"
document.write("Line 3 : " & Left(var,9) & "<br />")
</script>
</body>
</html>
将其另存为.html并在Internet Explorer中执行时，上述脚本将产生以下结果：
Line 1 : Mi Line 2 : MS VB Line 3 : microsoft