function ChangeImage(ImageName, NewImage, Directory)
   {
      if (document.images)
          {
             if (String (Directory) != "undefined")
             document[ImageName].src = Directory + "/" + NewImage;
             else
             document[ImageName].src = "images/" + NewImage;
           }
                         
    }


var win = null;
function newWindow(mypage,myname,w,h,features) 
{
  var winl = (screen.width-w)/2;
  var wint = (screen.height-h)/2;
	  if (winl < 0) winl = 0;
	  if (wint < 0) wint = 0;
		  var settings = 'height=' + h + ',';
		  settings += 'width=' + w + ',';
		  settings += 'top=' + wint + ',';
		  settings += 'left=' + winl + ',';
		  settings += features;
	  win = window.open(mypage,myname,settings);
	  win.window.focus();

}

function createCookie(name,value,days)
{
	if (days)
	{
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name)
{
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++)
	{
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name)
{
	createCookie(name,"",-1);
}