/*
 *	20.06.2005 17:27
 *	InputPlaceholder Class v 0.1a
 *
 *	30.06.2005 20:36
 *	InputPlaceholder Class v 0.1b
 *
 *	01.07.2005 18:30
 *	InputPlaceholder Class v 0.1c
 */

/*	:
 *		
 *
 *	
 *		Input			 ,   
 *		Value			   
 *		CssFilled		 css-    
 *		CssEmpty		 css-    
 */

/*	
 *	:
 *		input			  ( input[@type='text'] ),   
 *		value			   , . .   placeholder
 *		cssFilled		 css-     (  input)
 *		cssEmpty		 css-     (  input)
 */
/*
	  ,    .
*/
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 = ''
		this.Input.className = this.CssFilled
	}
	else
	{
			this.Input.className = this.CssFilled
	}
}

InputPlaceholder.prototype.onKeyDown = function()
{
	this.Input.className = this.CssFilled
}

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
	}
}