// JavaScript Document

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function isEmpty(s)
{
	return((s==null)||(s.length==0))
}

var whitespace=" \t\n\r";

function isWhitespace(s)
{
	i=0;
	
	if(isEmpty(s)) 
		return true; 
		
	for(i=0;i< s.length;i++)
	{
		c=s.charAt(i);
		
		if(whitespace.indexOf(c)==-1) 
			return false;
	} 
	
	return true;
}

var DEOK=false;

function isEmail(s)
{
	if(isEmpty(s))
		if(isEmail.arguments.length==1) 
			return DEOK;
		else 
			return(isEmail.arguments[1]==true);
	
	if(isWhitespace(s)) 
		return false;
	
	i=1;
	sLength=s.length;
	
	while((i<sLength) && (s.charAt(i) !="@")){i++};
	
	if((i >=sLength) || (s.charAt(i) !="@")) 
		return false;
	else 
		i +=2;
		
	while((i < sLength) && (s.charAt(i) !=".")){i++};
	
	if((i >=sLength - 1) || (s.charAt(i) !=".")) 
		return false;
	else 
		return true;
}

function validate_nl_register(name, email)
{
	if(isEmpty(name))
	{
		alert('The name is empty.');
		
		return false;
	}
	
	if(isEmpty(email))
	{
		alert('The email is empty.');
		
		return false;
	}
	else if (!isEmail(email))
		{
			alert('The email is incorrect.');
			return false;
		}
		
	return true;
}

function validate(ids, names, types)
{
	for(var i = 0; i < ids.length; i++)
	{
		value = document.getElementById(ids[i]).value;
		
		switch(types[i])
		{
			case 'email' :
				if(isEmpty(value))
				{
					alert('The ' +  names[i] + ' is empty.');
					
					return false;
				}
				else if(!isEmail(value))
				{
					alert('The ' +  names[i] + ' is incorrect.');
					
					return false;
				}
	
				break;
			case 'text'  :
				if(isEmpty(value))
				{
					alert('The ' +  names[i] + ' is empty.');
					
					return false;
				}
				
				break;
		}
	}
	
	return true;
}