checkText输入框可输入字符个数提示

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checkText输入框可输入字符个数提示：

从xweibo提取出来的，做了相应修改

var myUtil = {checkText : function(textSelector, tipSelector, num) {var t = textSelector.val();var v = $.trim(textSelector.val());var left = this.calWbText(v, num);if (left >= 0)tipSelector.html(this.getText('您还可以输入{0}字', '<span>' + left+ '</span>'));elsetipSelector.html(this.getText('已超出{0}字', '<span>' + (-left)+ '</span>'));// this.jqWarn.checkClass(exceedCS,left<0);return left >= 0 && v;},calWbText : function(text, max) {if (max === undefined)max = 140;var cLen = 0;var matcher = text.match(/[^\x00-\xff]/g), wlen = (matcher && matcher.length) || 0;return Math.floor((max * 2 - text.length - wlen) / 2);},templ : function(str, map, urlencode, cascade) {return str.replace(/\{([\w_$]+)\}/g, function(s, s1) {var v = map[s1];if (cascade && typeof v === 'string')v = argument.callee(v, map, urlencode, cascade);if (v === undefined || v === null)return '';return urlencode ? encodeURIComponent(v) : v;});},texts : {},getText : function(tx, map) {var texts = this.texts;if (tx in texts) {tx = texts[tx];}if (map !== undefined) {return this.templ(tx,$.isArray(map) || typeof map == 'object' ? map : [ map ]);}return tx;}};

使用myUtil.checkText($(‘#text’), $('#tip'), 1000);

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