如何截取一个文本框中除去最后三位的内容

Question

我要javascript的版本，以上的是vbscript的

Answer 1

soory
bbb=left(request("xxx"),len(request("xxx"))-3)

Answer 2

str="aaaa"youwantstr=str.substring(1,length(str)-3)

Answer 3

<script>
str="a123"youwantstr1=str.substring(str.length-3)
youwantstr2=str.substr(str.length-3)
youwantstr3=str.slice(-3)alert(youwantstr1)
alert(youwantstr2)
alert(youwantstr3)
</script>

Answer 4

<script>
str="a123"youwantstr1=str.substring(0,str.length-3)
youwantstr2=str.substr(0,str.length-3)
youwantstr3=str.slice(0,-3)alert(youwantstr1)
alert(youwantstr2)
alert(youwantstr3)
</script>

Answer 5

<script>
str="a123"
alert(str.replace(/[\w\W]{3}$/,""))
</script>

Answer 6

<script>
str="a123"
alert(str.replace(/.{3}$/,""))
</script>