function toggle(div_id) {
	var el = document.getElementById(div_id);
	if ( el.style.display == 'none' ) {	el.style.display = 'block';}
	else {el.style.display = 'none';}
}
function blanket_size(popUpDivVar) {
	if (typeof window.innerWidth != 'undefined') {
		viewportheight = window.innerHeight;
	} else {
		viewportheight = document.documentElement.clientHeight;
	}
	if ((viewportheight > document.body.parentNode.scrollHeight) && (viewportheight > document.body.parentNode.clientHeight)) {
		blanket_height = viewportheight;
	} else {
		if (document.body.parentNode.clientHeight > document.body.parentNode.scrollHeight) {
			blanket_height = document.body.parentNode.clientHeight;
		} else {
			blanket_height = document.body.parentNode.scrollHeight;
		}
	}
	var blanket = document.getElementById('blanket');
	blanket.style.height = blanket_height + 'px';
	var popUpDiv = document.getElementById(popUpDivVar);
	popUpDiv_height=blanket_height/2-190;//200 is half popup's height
	//popUpDiv.style.top = popUpDiv_height + 'px';
	popUpDiv.style.top = '200px';
}
function window_pos(popUpDivVar) {
	if (typeof window.innerWidth != 'undefined') {
		viewportwidth = window.innerHeight;
	} else {
		viewportwidth = document.documentElement.clientHeight;
	}
	if ((viewportwidth > document.body.parentNode.scrollWidth) && (viewportwidth > document.body.parentNode.clientWidth)) {
		window_width = viewportwidth;
	} else {
		if (document.body.parentNode.clientWidth > document.body.parentNode.scrollWidth) {
			window_width = document.body.parentNode.clientWidth;
		} else {
			window_width = document.body.parentNode.scrollWidth;
		}
	}
	var popUpDiv = document.getElementById(popUpDivVar);
	window_width=window_width/2-320;//200 is half popup's width
	popUpDiv.style.left = window_width + 'px';
}
function popupcss(windowname) {
	blanket_size(windowname);
	window_pos(windowname);
	toggle('blanket');
	toggle(windowname);		
}
function popup(windowname) {
  var count = GetCookie('count');
  if (count == null) {
    count=1;
    SetCookie('count', count, exp);
    popupcss(windowname);
  } else {
    count++;
    SetCookie('count', count, exp);
  }
}

// Popup one time
var expDays = 1; 

function GetCookie (name) { 
  var arg = name + "="; 
  var alen = arg.length; 
  var clen = document.cookie.length; 
  var i = 0; 

  while (i < clen) { 
	    var j = i + alen; 

		if (document.cookie.substring(i, j) == arg) 
			return getCookieVal (j); 

		i = document.cookie.indexOf(" ", i) + 1; 
		if (i == 0) break; 
	} 
	return null;
}

function SetCookie (name, value) { 
  var argv = SetCookie.arguments; 
  var argc = SetCookie.arguments.length; 
  var expires = (argc > 2) ? argv[2] : null; 
  var path = (argc > 3) ? argv[3] : null; 
  var domain = (argc > 4) ? argv[4] : null; 
  var secure = (argc > 5) ? argv[5] : false; 
document.cookie = name + "=" + escape (value) + 
((expires == null) ? "" : ("; expires=" + expires.toGMTString())) + 
((path == null) ? "" : ("; path=" + path)) + 
((domain == null) ? "" : ("; domain=" + domain)) + 
((secure == true) ? "; secure" : "");

}

function DeleteCookie (name) { 
  var exp = new Date(); 
  exp.setTime (exp.getTime() - 1); 
  var cval = GetCookie (name); 
  document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();

}

var exp = new Date(); 
exp.setTime(exp.getTime() + (expDays*24*60*60*1000));

function amt(){
  var count = GetCookie('count')
   
  if(count == null) {
    SetCookie('count','1')
    return 1
  } else {
	var newcount = parseInt(count) + 1;
	DeleteCookie('count')
	SetCookie('count',newcount,exp)
	return count
  } 
}

function getCookieVal(offset) {
   var endstr = document.cookie.indexOf (";", offset);
   if (endstr == -1)
     endstr = document.cookie.length;
     return unescape(document.cookie.substring(offset, endstr));
}