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}}