function lf_gradient(id, level)
{
	var box = document.getElementById(id);
	box.style.opacity = level;
	box.style.MozOpacity = level;
	box.style.KhtmlOpacity = level;
	box.style.filter = "alpha(opacity=" + level * 100 + ")";
	box.style.display="block";
	return;
}


function lf_fadein(id) 
{
	var level = 0;
	while(level <= 1)
	{
		setTimeout( "lf_gradient('" + id + "'," + level + ")", (level* 1000) + 10);
		level += 0.01;
	}
}


// Open the lightbox


function lf_openbox(formtitle, fadin)
{
  var box = document.getElementById('lf_box'); 
  document.getElementById('lf_filter').style.display='block';

  var btitle = document.getElementById('lf_boxtitle');
  btitle.innerHTML = formtitle;
  
  if(fadin)
  {
	 lf_gradient("lf_box", 0);
	 lf_fadein("lf_box");
  }
  else
  { 	
    box.style.display='block';
  }
  
 center = window.lfcenter({width:496,height:296});

 box.style.left = center.x;
 box.style.top = center.y;
  
 document.subscribe.elements['subscription[email]'].focus();
  
}


// Close the lightbox

function closebox()
{
   document.getElementById('lf_box').style.display='none';
   document.getElementById('lf_filter').style.display='none';
}

window.size = function() {
	var w = 0;
	var h = 0;
	
	//IE
	if(!window.innerWidth) {
		
		//strict mode
		if(!(document.documentElement.clientWidth == 0)) {

			w = document.documentElement.clientWidth;
			h = document.documentElement.clientHeight;
		//quirks mode
		} else {

			w = document.body.clientWidth;
			h = document.body.clientHeight;
		}
	//w3c
	} else {
		
		w = window.innerWidth;
		h = window.innerHeight;
	}
	
	return {width:w,height:h};
}

window.lfcenter = function() {

	var hWnd = (arguments[0] != null) ? arguments[0] : {width:0,height:0};
	var _x = 0;
	var _y = 0;
	var offsetX = 0;
	var offsetY = 0;
	//IE
	if(!window.pageYOffset) {
	//strict mode
		if(!(document.documentElement.scrollTop == 0)) {
			offsetY = document.documentElement.scrollTop;
			offsetX = document.documentElement.scrollLeft;
		//quirks mode
		} else {
		
			offsetY = document.body.scrollTop;
			offsetX = document.body.scrollLeft;
		}
	//w3c
	} else {
		
		offsetX = window.pageXOffset;
		offsetY = window.pageYOffset;
	}
	
	_x = ((this.size().width-hWnd.width)/2)+offsetX;
	_y = ((this.size().height-hWnd.height)/2)+offsetY;
	
	//alert(_x);
	
	return{x:_x,y:_y};
}