// JavaScript Document
function getElementsByClass(className)
{
  var all = document.all ? document.all :  document.getElementsByTagName('*');
  var elements = new Array();
  for (var e = 0; e < all.length; e++)
    if (all[e].className.indexOf(className) != -1)
      elements[elements.length] = all[e];
  return elements;	
}
function colorizeNavLink(navId) 
{
	var elems = getElementsByClass('navLink');	
	for (var i=0;i < elems.length; i++ )
	{
		elems[i].className = "navLink";		
	}				
	document.getElementById(navId).className = "navLink navActive";				
}

function colorizeSlideLink(slideId) 
{
	var elems = getElementsByClass('slideNav');	
	for (var i=0;i < elems.length; i++ )
	{
		elems[i].className = "slideNav";		
	}				
	document.getElementById(slideId).className = "slideNav slideActive";				
}
function checkForm(form1)
{
	with(form1)
	{
		if(name.value == '')
		{
			alert('Please enter your name.');
			name.focus();
			return false;			
		}
		else if(email.value == '' || !(/\w{1,}[@][\w\-]{1,}([.]([\w\-]{1,})){1,3}$/.test(email.value))  )	
		{
			alert('Please enter a valid email address.');
			email.focus();
			return false;
		}
		
		else if(subject.value == '')
		{
			alert('Please enter the subject.');
			subject.focus();
			return false;			
		}
		else if(message.value == '')
		{
			alert('Please enter your message.');
			message.focus();
			return false;			
		}		
	}
	return true;
}