常用工具函数

1、日期格式化

dateFormat = function(date, formatStr){
var str = formatStr;
var Week = ['日','一','二','三','四','五','六'];

str=str.replace(/yyyy|YYYY/,date.getFullYear());
str=str.replace(/yy|YY/,(date.getYear() % 100)>9?(date.getYear() % 100).toString():'0' + (date.getYear() % 100));

str=str.replace(/MM/,date.getMonth()>9?date.getMonth().toString():'0' + date.getMonth());
str=str.replace(/M/g,date.getMonth());

str=str.replace(/w|W/g,Week[date.getDay()]);

str=str.replace(/dd|DD/,date.getDate()>9?date.getDate().toString():'0' + date.getDate());
str=str.replace(/d|D/g,date.getDate());

str=str.replace(/hh|HH/,date.getHours()>9?date.getHours().toString():'0' + date.getHours());
str=str.replace(/h|H/g,date.getHours());
str=str.replace(/mm/,date.getMinutes()>9?date.getMinutes().toString():'0' + date.getMinutes());
str=str.replace(/m/g,date.getMinutes());
str=str.replace(/ss|SS/,date.getSeconds()>9?date.getSeconds().toString():'0' + date.getSeconds());
str=str.replace(/s|S/g,date.getSeconds());
return str;
}

调用： 

dateFormat(new Date(), 'MM-dd hh:mm')；

2、获取URL中参数值

用正则表达式：

function getQueryString(name) {
var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i");
var r = window.location.search.substr(1).match(reg);
if (r != null) return decode(r[2]); return null;
}

不用正则表达式：

function getQueryString (str,name) {
var string = window.location.search.substr(1) || str.substr(1);
if( !string ) return;

var arr = string.split('&');
for (var i = 0; i < arr.length; i++) {
var item = arr[i].split('=');
if(item.length < 2) continue;
if(item[0] === name) return decodeURI(item[1]);
};
}