摘要: function isNaN(num){ var ret=Number(num); ret+=""; if(ret=="NaN"){ return true; }else{ return false; } } 阅读全文
posted @ 2020-05-07 10:50 菜鸟程序员的总结 阅读(740) 评论(0) 推荐(1)
摘要: <!doctype html> <html> <head> <meta charset="UTF-8"> <meta name="viewport" content="maximum-scale=1.0,minimum-scale=1.0,user-scalable=0,width=device-w 阅读全文
posted @ 2020-05-07 10:23 菜鸟程序员的总结 阅读(772) 评论(0) 推荐(0)