1、一、文本框输入限制相关/**文本框只允许输入数字**/function IsNumber(obj) 撑俯擂摔{ $("#" + obj).bind("contextmenu", function () { return false; }); $("#" + obj).css('ime-mode', 'disabled'); $("#" + obj).keypress(function (e) { if (e.which != 8 && e.which != 0 && (e.which < 48 || e.which > 57)) { return false; } });}/**只能输入数字和小数点**/function IsMoney(obj) { $("#" + obj).bind("contextmenu", function () { return false; }); $("#" + obj).css('ime-mode', 'disabled'); $("#" + obj).bind("keydown", function (e) { var key = window.event ? e.keyCode : e.which; if (isFullStop(key)) { return $(this).val().indexOf('.') < 0; } return (isSpecialKey(key)) || ((isNumber(key) && !e.shiftKey)); }); function isNumber(key) { return (key >= 48 && key <= 57) || (key >= 96 && key <= 105) } function isSpecialKey(key) { //return key == 46 || (key >= 37 && key <= 40) || key == 35 || key == 36 || key == 9 || key == 13 return key == 8 || key == 46 || (key >= 37 && key <= 40) || key == 35 || key == 36 || key == 9 || key == 13 } function isFullStop(key) { return key == 190 || key == 110; }}
2、二、数字格式转换/*** 金额格式(保留2位小数)后格式化成金额形式*/function FormatCurrency(num) { num = num.toString().replace(/\$|\,/g, ''); if (isNaN(num)) num = "0"; sign = (num == (num = Math.abs(num))); num = Math.floor(num * 100 + 0.50000000001); cents = num % 100; num = Math.floor(num / 100).toString(); if (cents < 10) cents = "0" + cents; for (var i = 0; i < Math.floor((num.length - (1 + i)) / 3) ; i++) num = num.substring(0, num.length - (4 * i + 3)) + '' + num.substring(num.length - (4 * i + 3)); return (((sign) ? '' : '-') + num + '.' + cents);}/**保留两位小数 功能：将浮点数四舍五入，取小数点后2位 **/function ToDecimal(x) { var f = parseFloat(x); if (isNaN(f)) { return 0; } f = Math.round(x * 100) / 100; return f;}
3、三、数组是否存在某值/**查找数组中是否存在某个值arr:数组val:对象值**/function ArrayExists(arr, val) { for (var i = 0; i < arr.length; i++) { if (arr[i] == val) return true; } return false;}