//TextLimiter by Jean-Nicolas Jolivet\n//Copyright (c) 2008 http://www.silverscripting.com\n//MIT License: http://www.opensource.org/licenses/mit-license.php\n \nvar TextLimiter = function (el, options) {\n this.message = options.message || " chars left";\n this.el = (typeof el === 'string') ? document.getElementById(el) : el;\n this.charLimit = options.charLimit || 100;\n this.interval = options.interval || 200;\n this.addLineBreak = options.addLineBreak || true;\n \n this.buildElements();\n \n};\n \nTextLimiter.prototype.buildElements = function() {\n var parentEl = this.el.parentNode;\n var that = this;\n \n this.charCountEl = document.createElement('span');\n this.charCountEl.className = 'textlimiter';\n this.charCountEl.innerHTML = this.charLimit + this.message;\n if(this.addLineBreak) {\n var lineBreak = document.createElement('br');\n parentEl.insertBefore(lineBreak, this.el.nextSibling);\n parentEl.insertBefore(this.charCountEl, lineBreak.nextSibling);\n }\n else {\n parentEl.insertBefore(this.charCountEl, this.el.nextSibling);\n }\n this.oldCharCount = this.el.value.length;\n this.el.onfocus = function() {\n that.intervalTimer = setInterval(function(){that.dispatchChangeEvent();}, that.interval);\n };\n \n this.el.onblur = function() {\n clearTimeout(that.intervalTimer);\n };\n \n};\n \nTextLimiter.prototype.dispatchChangeEvent = function() {\n if(this.oldCharCount != this.el.value.length) {\n \n var newCharCount = this.el.value.length;\n var charCnt = this.charLimit - newCharCount;\n if (charCnt <= 0) {\n this.el.value = this.el.value.substr(0, this.charLimit);\n charCnt = 0;\n }\n this.charCountEl.innerHTML = charCnt + this.message;\n }\n this.oldCharCount = this.el.value.length;\n};