function troca(item){

	switch(item){

	
	case 'limpar': 

		document.limpar.src = image1.src

	break;	
	
	case 'enviar': 

		document.enviar.src = image3.src

	break;	
	
	case 'limpar2': 

		document.limpar2.src = image5.src

	break;	
	
	case 'enviar2': 

		document.enviar2.src = image7.src

	break;	
	
	case 'limpar3': 

		document.limpar3.src = image9.src

	break;	
	
	case 'enviar3': 

		document.enviar3.src = image11.src

	break;	
		
	}
}

function troca_off(item){

	switch(item){
	
	case 'limpar': 

		document.limpar.src = image2.src

	break;	
	
	case 'enviar': 

		document.enviar.src = image4.src

	break;	
	
	case 'limpar2': 

		document.limpar2.src = image6.src

	break;	
	
	case 'enviar2': 

		document.enviar2.src = image8.src

	break;	
	
	case 'limpar3': 

		document.limpar3.src = image10.src

	break;	
	
	case 'enviar3': 

		document.enviar3.src = image12.src

	break;	
		
	}
}

image1 = new Image()
image1.src ="../../img/bt_limpar_over.gif"

image2 = new Image()
image2.src ="../../img/bt_limpar.gif"

image3 = new Image()
image3.src ="../../img/bt_enviar_over.gif"

image4 = new Image()
image4.src ="../../img/bt_enviar.gif"

image5 = new Image()
image5.src ="../../img/bt_limpar_over2.gif"

image6 = new Image()
image6.src ="../../img/bt_limpar2.gif"

image7 = new Image()
image7.src ="../../img/bt_enviar_over2.gif"

image8 = new Image()
image8.src ="../../img/bt_enviar2.gif"

image9 = new Image()
image9.src ="../../img/bt_limpar_over3.gif"

image10 = new Image()
image10.src ="../../img/bt_limpar3.gif"

image11 = new Image()
image11.src ="../../img/bt_enviar_over3.gif"

image12 = new Image()
image12.src ="../../img/bt_enviar3.gif"