function openTAF(){
	new Effect.SlideDown('taf',{duration:0.4}) ;	
}

function closeTAF(){
	new Effect.SlideUp('taf',{duration:0.4}) ;	
}

function toggleTAF(){
	if(document.getElementById('taf').style.display == "none"){
		openTAF() ;	
	}else{
		closeTAF() ;
	}
}

function validateTAF() {	
	sendersName  = document.getElementById("sendersName");
	sendersEmail = document.getElementById("sendersEmail");
	friendsName  = document.getElementById("friendsName");
	friendsEmail = document.getElementById("friendsEmail");
	
	if(!sendersName.value
	   		|| !friendsName.value
	   		|| !sendersEmail.value
	   		|| !friendsEmail.value){
		alert('please fill out all required fields') ;
		return false;
	}else{
		return true;	
	}
}