数字输入框(价格输入框)

html代码

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>价格录入限定</title>
<script type="text/javascript" src="static/commons/js/jquery-2.0.3.min.js" ></script>
<script type="text/javascript" src="amount.js" ></script>
<script>
	$(function(){
		$("input[name=city]").amount();
	});
</script>
</head>
<body>
<input type="text" name="city" value="" max="99996" int="false" />

<input type="text" name="city" value="" max="99998"  int="false" />

<input type="text" name="city" value="" max="999995"  int="false" />
</body>
</html>

 js代码:

(function($) {

	$.fn.amount = function() {
		/**
		 * 实时动态强制更改用户录入
		 * arg1 inputObject
		 **/
		return this.each(function() {
			var $this = $(this);
			var isInput = $this.is('input');
			var _events = [];
			var len = $this.attr("max").split(".")[0].length;
			var isInt = $this.attr("int") == "true" ? true : false;
			_attachEvents();

			function _attachEvents() {
				_detachEvents();
				if (isInput) { // single input
					_events = [
						[$this, {
							blur: $.proxy(overFormat, $this),
							keyup: $.proxy(keyupEv, $this)
						}]
					];
				}
				for (var i = 0, el, ev; i < _events.length; i++) {
					el = _events[i][0];
					ev = _events[i][1];
					el.on(ev);
				}
			}

			function _detachEvents() {
				for (var i = 0, el, ev; i < _events.length; i++) {
					el = _events[i][0];
					ev = _events[i][1];
					el.off(ev);
				}
				_events = [];
			}

			function keyupEv(e) {
				var regStrs = [
					['^0(\\d+)$', '$1'], //禁止录入整数部分两位以上,但首位为0
				];

				if (!isInt) {
					regStrs.push(['[^\\d\\.]+$', '']); //禁止录入任何非数字和点
					regStrs.push(['\\.(\\d?)\\.+', '.$1']); //禁止录入两个以上的点
					regStrs.push(['^(\\d+\\.\\d{2}).+', '$1']); //禁止录入小数点后两位以上
				} else {
					regStrs.push(['[^\\d]+$', '']); //禁止录入任何非数字
				}
				var value = "";
				for (i = 0; i < regStrs.length; i++) {
					var reg = new RegExp(regStrs[i][0]);
					this.val(this.val().replace(reg, regStrs[i][1]));
				}
				value = this.val();
				if (value[len] != ".") {
					value = value.substring(0, len);
					var reg = new RegExp("^[0-9]*$");;
					if (reg.test(value)) {
						this.val(value);
					}
				}

			}

			/**
			 * 录入完成后,输入模式失去焦点后对录入进行判断并强制更改,并对小数点进行0补全
			 * arg1 inputObject
			 * 这个函数写得很傻,是我很早以前写的了,没有进行优化,但功能十分齐全,你尝试着使用
			 * 其实有一种可以更快速的JavaScript内置函数可以提取杂乱数据中的数字:
			 * parseFloat('10');
			 **/
			function overFormat(e) {
				var th = this;
				var v = th.val();
				var max = th.attr("max");
				v = (v - 0) > (max - 0) ? max : v;
				if (isInt) {
					th.val(v);
					return;
				}
				if (v === '') {
					v = '0.00';
				} else if (v === '0') {
					v = '0.00';
				} else if (v === '0.') {
					v = '0.00';
				} else if (/^0+\d+\.?\d*.*$/.test(v)) {
					v = v.replace(/^0+(\d+\.?\d*).*$/, '$1');
					v = inp.getRightPriceFormat(v).val;
				} else if (/^0\.\d$/.test(v)) {
					v = v + '0';
				} else if (!/^\d+\.\d{2}$/.test(v)) {
					if (/^\d+\.\d{2}.+/.test(v)) {
						v = v.replace(/^(\d+\.\d{2}).*$/, '$1');
					} else if (/^\d+$/.test(v)) {
						v = v + '.00';
					} else if (/^\d+\.$/.test(v)) {
						v = v + '00';
					} else if (/^\d+\.\d$/.test(v)) {
						v = v + '0';
					} else if (/^[^\d]+\d+\.?\d*$/.test(v)) {
						v = v.replace(/^[^\d]+(\d+\.?\d*)$/, '$1');
					} else if (/\d+/.test(v)) {
						v = v.replace(/^[^\d]*(\d+\.?\d*).*$/, '$1');
						ty = false;
					} else if (/^0+\d+\.?\d*$/.test(v)) {
						v = v.replace(/^0+(\d+\.?\d*)$/, '$1');
						ty = false;
					} else {
						v = '0.00';
					}
				}
				th.val(v);
			}
		});


	}

})(jQuery);

 使用说明:

max:输入框所支持的最大值

int:配置输入框是否只输入整数

posted @ 2015-04-15 11:43  kaisela  阅读(1254)  评论(0编辑  收藏  举报