function InputPlaceholder (input, value, cssFilled, cssEmpty){ var thisCopy = this; this.Input = input; this.Value = value; this.SaveOriginal = (input.value == value); this.CssFilled = cssFilled; this.CssEmpty = cssEmpty; this.setupEvent (this.Input, 'focus', function() {return thisCopy.onFocus()}); this.setupEvent (this.Input, 'blur',  function() {return thisCopy.onBlur()}); this.setupEvent (this.Input, 'keydown', function() {return thisCopy.onKeyDown()}); if (input.value == '') this.onBlur(); return this }; InputPlaceholder.prototype.setupEvent = function (elem, eventType, handler){ if (elem.attachEvent){ elem.attachEvent ('on' + eventType, handler);} if (elem.addEventListener){elem.addEventListener (eventType, handler, false)}};InputPlaceholder.prototype.onFocus = function(){if (!this.SaveOriginal &&  this.Input.value == this.Value){this.Input.value = '';}else{this.Input.className = '';}};InputPlaceholder.prototype.onKeyDown = function(){this.Input.className = '';};InputPlaceholder.prototype.onBlur = function(){if (this.Input.value == '' || this.Input.value == this.Value){this.Input.value = this.Value; this.Input.className = this.CssEmpty;}else{this.Input.className = this.CssFilled;}};