numberInput.js

var numberInput = {
		options: {
			$wrap: $('.numberCheckInput'),
			headZero: false,
			decimalPlace: 2,
			min: 0,
			max: 0,
			required: true,
			tips: {
				max: "金额不能高于",
				required: '金额不能为空'
			},
			afterDelete: $.noop,
			afterCheck: $.noop
		},
		cache: {},
		init: function (options) {
			var me = this,
				ca = me.cache;
			$.extend(me.options, options);
			ca.$quickWrap = me.options.$wrap.find('.quick-wrap');
			ca.$input = ca.$quickWrap.find('input');
			ca.$tip = me.options.$wrap.find('.tip');
			me.initCheck();
			me.initQuickDelete();
		},
		initCheck: function () {
			var me = this,
				ca = me.cache;
			ca.$input
				.bindLiveCheck(/[^\d\.]/g, function(e) {
					var v = this.value,
						w = $.trim(v)
							.replace(/\.+/g, "\.")
							.replace(new RegExp('\\.(\\d{0,' + me.options.decimalPlace + '}).*$'), ".$1")
							.substr(0, 12);
					if (v != w) {
						this.value = w;
					}
					me.checkBoundary();
				})
				.on('blur', function () {
					var v = this.value,
						w = $.trim(v)
							.replace(/^\./, "0.");
					if (!me.options.headZero) {
						w = w.replace(/^0+(\d)/, "$1");
					}
					if (v != w) {
						this.value = w;
					}
					me.checkBoundary();
				})
				.on('keypress keydown', function (e) {
					var code = e.charCode || e.keyCode;
					if (+this.value === 0&&String.fromCharCode(code) === '0') {
						return false;
					}
				});
		},
		initQuickDelete: function () {
			var me = this,
				ca = me.cache;
			style.use();
			ca.$quickWrap
				.quickDelete({
					sameWidth: false
				})
				.find('input')
				.bind({
					afterDelete: function() {
						ca.$tip.text("");
						me.options.afterDelete();
					}
				});
		},
		checkBoundary: function () {
			var me = this,
				ca = me.cache;
			var tip,
				value = +ca.$input.val();
			ca.$tip.text('');
			ca.value  = value;
			if (ca.$input.val() === '') {
				ca.value = false;
			} else {
				if (value === 0) {
					if (me.options.required) {
						tip = me.options.tips.required;
						ca.value = false;
					}
				}
				if (value < me.options.min) {
					tip = '金额不能低于' + me.options.min + '元';
					ca.value = false;
				}
				if (value > me.options.max) {
					tip = me.options.tips.max  + me.options.max + '元';
					ca.value = false;
				}
				if (String(value).length > 12) {
					tip = "已经输入12位了，不能输入更多";
					ca.value = false;
				}
				if (tip) {
					ca.$tip.text(tip);
				}
			}
			me.options.afterCheck();
			return ca.value;
		},
		val: function (value) {
			var me = this,
				ca = me.cache;
			ca.$input.val(value);
			ca.$tip.text("");
			ca.value = value;
			return ca.value;
		}
	};