js中string和number类型互转换技巧

1、string-->number

2、number-->string

<script type="text/javascript">
function screenInfo() {
var str = '012.8372';
var s = 0;
str = str * 1;
alert(typeof (str));//number
s += '';
alert(typeof (s));//string

var boo = true;
alert(typeof(boo));//boolean

var bs = Boolean(s);
alert("bs:" + typeof (bs));//boolean
alert("bsv:" + bs);//true
}
</script>