var initHeight = 0;
var slidedown_direction = 1;
var slidedownContentBox = false;
var slidedownActive = false;
var contentHeight = false;
var slidedownSpeed = 50;
var slidedownTimer = 3;

function slidedown_showHide()
{
	 if(initHeight==0)slidedown_direction=slidedownSpeed; else slidedown_direction = slidedownSpeed*-1;
	 if(!slidedownContentBox){
		 slidedownContentBox = document.getElementById('emailsubscribebox');
		 contentHeight = 100;
	 }
	 slidedownContentBox.style.visibility='visible';
	 slidedownActive = true;
	 slidedown_showHide_start();
}
function slidedown_showHide_start()
{
	if(!slidedownActive)return;
		initHeight = initHeight/1 + slidedown_direction;
	if(initHeight <= 0){
		slidedownActive = false;
		slidedownContentBox.style.visibility='hidden';
		initHeight = 0;
	}
	if(initHeight>contentHeight){
		slidedownActive = false;
	}
	slidedownContentBox.style.height = initHeight + 'px';
	setTimeout('slidedown_showHide_start()',slidedownTimer);
}

function setSlideDownSpeed(newSpeed)
{
	slidedownSpeed = newSpeed;
}