javascript 字符串函数

字符串的截取

str.substring(0,index)

字符串转换为日期

<script>
 var s = "2017-04-10";
 var d = s.replace(/-/g,"/");
 var date = new Date(d);
 -------------------------------
 var d2 = "2017/04/10 12:23:12";
 var date = new Date(d2);
</script>