1：//截取url带过来的参数
function getvl(name) { var reg = new RegExp("(^|\\?|&)" + name + "=([^&]*)(\\s|&|$)", "i"); return reg.test(location.href) ? decodeURI(RegExp.$2.replace(/\+/g, " ")) : '';};2：//判断对象的长度
Object.size = function (obj) { var size = 0, key; for (key in obj) { if (obj.hasOwnProperty(key)) size++; } return size;};3：// 转换字符串成时间function changeTime(t, nohour) {
if (String(t).indexOf("-") >= 0 || t == null) { return t = ''; } else { var date = new Date(t); Y = date.getFullYear() + '-'; M = (date.getMonth() + 1 < 10 ? '0' + (date.getMonth() + 1) : date.getMonth() + 1) + '-'; D = date.getDate() < 10 ? '0' + date.getDate() + ' ' : date.getDate() + ' '; h = date.getHours() < 10 ? '0' + date.getHours() + ':' : date.getHours() + ':'; m = date.getMinutes() < 10 ? '0' + date.getMinutes() + ':' : date.getMinutes() + ':'; s = date.getSeconds() < 10 ? '0' + date.getSeconds() : date.getSeconds(); return nohour ? Y + M + D : Y + M + D + h + m + s; }}
4://纯数字且不能输入空格且不能输入小数点// isZero == zero可为零// isZero == unNone不能为空格function keepNum(obj, num, isZero) { var $this = $(obj); var v = $this.val(); if (isNaN(v) || (v.indexOf('.') != -1)) { var values = v.slice(0, -1); if (isNaN(values)) { values = '' } values = values.replace(/\s/g, ""); $this.val(values); } else { //去除空格 $this.val(v.replace(/\s/g, "")); } num && (function () { var newValue = $this.val(); if (!isNaN(newValue) && newValue != '') { if (isZero == 'zero') { if (newValue < 0) { newValue = 0; } else if (newValue > num) { newValue = num; } } else { if (newValue < 1) { newValue = 1; } else if (newValue > num) { newValue = num; } } } else { if (isZero == 'unNone') { if (newValue < 1) { newValue = 1; } else if (newValue > num) { newValue = num; } } } $this.val(newValue); })()}5://纯数字且不能输入空格且不能输入小数点可以是负数 默认没有小数function keepSR(obj, num,maxlength) { var imposeNum = maxlength ? (maxlength+1) : 1; var $this = $(obj); var v = $this.val(); if (isNaN(v)) { if(v!='-'){ var values = v.slice(0, -1); if (isNaN(values)) { values = '' } values = values.replace(/\s/g, ""); $this.val(values); } } else if (v.indexOf('.') != -1) { if (v.split('.')[1].length == imposeNum) { var values = v.slice(0, -1); $this.val(values); } else if (v.split('.')[1].length > imposeNum) { $this.val(''); } }else { //去除空格 $this.val(v.replace(/\s/g, "")); } num && (function () { var newValue = $this.val(); if (!isNaN(newValue) && newValue != '') { if (newValue < -num) { newValue = -num; } else if (newValue > num) { newValue = num; } } $this.val(newValue); })()}//数字且最限制小数点位数，（默认三位）且不能输入空格且可以为0function keepSH(obj, num ,maxlength) { var $this = $(obj); var v = $this.val(); var imposeNum = maxlength ? (maxlength+1) : 4;//限制小数点数量，默认为小数点后3位 if (isNaN(v)) { var values = v.slice(0, -1); if (isNaN(values)) { values = '' } $this.val(values); } else if (v.indexOf('.') != -1) { if (v.split('.')[1].length == imposeNum) { var values = v.slice(0, -1); $this.val(values); } else if (v.split('.')[1].length > imposeNum) { $this.val(''); } } else { $this.val(v.replace(/\s/g, "")); } var newValue = $this.val(); if (!isNaN(newValue) && newValue != '') { if (newValue > num) { newValue = num; } } $this.val(newValue);}function keepSH2(obj, num ,maxlength) { var $this = $(obj); var v = $this.val(); var imposeNum = maxlength ? (maxlength+1) : 4;//限制小数点数量，默认为小数点后3位 if (isNaN(v)) { var values = v.slice(0, -1); if (isNaN(values)) { values = '' } $this.val(values); } else if (v.indexOf('.') != -1) { if (v.split('.')[1].length == imposeNum) { var values = v.slice(0, -1); $this.val(values); } else if (v.split('.')[1].length > imposeNum) { $this.val(''); } } else { $this.val(v.replace(/\s|-/g, "")); } var newValue = $this.val(); if (!isNaN(newValue) && newValue != '') { if (newValue > num) { newValue = num; } } $this.val(newValue);}
// 检查是否为手机号function checkMobile(text) { var myreg = /^(1+\d{10})$/; return !myreg.test(text) ? false : true;}//仅输入中文,字母,数字function unCharacter(v) { return v.replace(/[^\a-\z\A-\Z0-9\u4E00-\u9FA5]/g,'')}//禁止特殊字符function unSpecial(v) { return v.replace(/[^u4e00-u9fa5w]/g,'')}
// 用来判断对象是否为空
function isEmptyObject(e) { var t; for (t in e) return !1; return !0}
//格式化日期：yyyy-MM-dd function formatDate(date) { var myyear = date.getFullYear(); var mymonth = date.getMonth() + 1; var myweekday = date.getDate(); if (mymonth < 10) { mymonth = "0" + mymonth; } if (myweekday < 10) { myweekday = "0" + myweekday; } return (myyear + "-" + mymonth + "-" + myweekday);}//获得某月的天数 function getMonthDays(myMonth) { var monthStartDate = new Date(nowYear, myMonth, 1); var monthEndDate = new Date(nowYear, myMonth + 1, 1); var days = (monthEndDate - monthStartDate) / (1000 * 60 * 60 * 24); return days;}//获得本季度的开始月份 function getQuarterStartMonth() { var quarterStartMonth = 0; if (nowMonth < 3) { quarterStartMonth = 0; } if (2 < nowMonth && nowMonth < 6) { quarterStartMonth = 3; } if (5 < nowMonth && nowMonth < 9) { quarterStartMonth = 6; } if (nowMonth > 8) { quarterStartMonth = 9; } return quarterStartMonth;}//获得本周的开始日期 function getWeekStartDate() { var weekStartDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek); return formatDate(weekStartDate);}//获得本周的结束日期 function getWeekEndDate() { var weekEndDate = new Date(nowYear, nowMonth, nowDay + (6 - nowDayOfWeek)); return formatDate(weekEndDate);}//获得上周的开始日期 function getpreWeekStartDate() { var weekStartDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek - 7); return formatDate(weekStartDate);}//获得上周的结束日期 function getpreWeekEndDate() { var weekEndDate = new Date(nowYear, nowMonth, nowDay + (-1 - nowDayOfWeek)); return formatDate(weekEndDate);}//获得本月的开始日期 function getMonthStartDate() { var monthStartDate = new Date(nowYear, nowMonth, 1); return formatDate(monthStartDate);}//获得本月的结束日期 function getMonthEndDate() { var monthEndDate = new Date(nowYear, nowMonth, getMonthDays(nowMonth)); return formatDate(monthEndDate);}//获得上月开始时间 function getLastMonthStartDate() { var lastMonth2 = lastMonth; var nowYear2 = nowYear; if (nowMonth < lastMonth) { var lastMonth2 = 11; var nowYear2 = nowYear - 1; } var lastMonthStartDate = new Date(nowYear2, lastMonth2, 1); return formatDate(lastMonthStartDate);}//获得上月结束时间 function getLastMonthEndDate() { var lastMonth2 = lastMonth; var nowYear2 = nowYear; if (nowMonth < lastMonth) { var lastMonth2 = 11; var nowYear2 = nowYear - 1; } var lastMonthEndDate = new Date(nowYear2, lastMonth2, getMonthDays(lastMonth)); return formatDate(lastMonthEndDate);}//获得本季度的开始日期 function getQuarterStartDate() { var quarterStartDate = new Date(nowYear, getQuarterStartMonth(), 1); return formatDate(quarterStartDate);}//获得本季度的结束日期 function getQuarterEndDate() { var quarterEndMonth = getQuarterStartMonth() + 2; var quarterStartDate = new Date(nowYear, quarterEndMonth, getMonthDays(quarterEndMonth)); return formatDate(quarterStartDate);}//计算当天 昨天 前天function _getDay(day) { var today = new Date(); var targetday_milliseconds = today.getTime() + 1000 * 60 * 60 * 24 * day; today.setTime(targetday_milliseconds); //注意，这行是关键代码 var tYear = today.getFullYear(); var tMonth = today.getMonth(); var tDate = today.getDate(); tMonth = doHandleMonth(tMonth + 1); tDate = doHandleMonth(tDate); return tYear + "-" + tMonth + "-" + tDate;}function doHandleMonth(month) { var m = month; if (month.toString().length == 1) { m = "0" + month; } return m;}
/*获取选中的文字*/
var _getSelectedText = function() {
if (window.getSelection) {
return window.getSelection().toString();
} else if (document.getSelection) {
return document.getSelection();
} else if (document.selection) {
return document.selection.createRange().text;
}else{
return "";
}
}
来源：https://www.cnblogs.com/ypwei/p/8967366.html