ASP按英文单词截取字符串

<%
'函数名：engotTopic
'作  用：按单词截英文字符串
'参  数：words   ----原字符串
'       position ----截取长度、位置
'返回值：截取后的字符串
function engotTopic(ByVal words,ByVal position)    
dim flag,length
    if words="" then
        engotTopic=""
        exit function
    end if
words=replace(replace(replace(replace(words,"&nbsp;"," "),"&quot;",chr(34)),"&gt;",">"),"&lt;","<")    
flag = false
length=len(words)
        if length>position then
            do while flag=false
            dim str,c
            str=mid(words,position+1,1)
            c=asc(str)
            if (c<65 and c<>39) or (c>90 and c<97) or c>122 then
            flag = true
            engotTopic=left(words,position)&"…"
            else
            position=position-1
             if position=0 then exit do
            end if
            loop
        else
            engotTopic=words
        end if
engotTopic=replace(replace(replace(engotTopic,chr(34),"&quot;"),">","&gt;"),"<","&lt;")        
end function
%>

 使用方法：

<%=engotTopic("Your job won't take care of you when you are sick. Your friends and parents will. Stay in touch.",17)%>

输出：Your job won't…