用javascript自动给最后结果(String型的)加上逗号

<script language="javascript">

function ParseMoney(str)

{

var idx = str.indexOf(".")

while (str.substring(0, idx++).length % 3)

{

str = "0" + str

}

return str.replace(/(\d{3})/g, "$1,").replace(/,\./, ".").replace(/(^0*)|(,$)/g, "")

}

document.write(ParseMoney("12356789.365145"))

</script>

运行试试吧，没问题的

<script>

document.getElementById('aaa').onclick=function(){

 var s=""

 for(var i=0i<this.options.lengthi++){

    if(this.options[i].selected){

       if(s)s+=","

       s+=this.options[i].value

    }

 }

 document.getElementById("bbb").value = s

}

</script>

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