JavaScript中字符串与数字类型互转的简便技巧

<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>