// JavaScript Document

function empty(x)
{
	return x == '';
}

function numeric(x)
{
   var ValidChars = "0123456789.";
   var numeric=true;
   var Char; 
   for (i = 0; i < x.length && numeric == true; i++) 
   { 
     Char = x.charAt(i); 
     if (ValidChars.indexOf(Char) == -1)	 
		 	numeric = false;		 
		}
   return numeric;   
}

function email(x)
{
  email_regx = /^[^@]+@[^@]+.[a-z]{2,}$/i;
	return !(x.search(email_regx) == -1); 
}

function validate_form()
{
	$error_count = 0;
	$error_inner = '<strong>The following errors have occured...</strong><br>';
	
	/* validation start */	

	
	if(empty(document.getElementById('subject').value))
	{
		document.getElementById('subject_label').className = 'label_error';
		$error_inner += 'Please choose a subject<br>';
		$error_count++;
	}
	else
	{
		document.getElementById('comments_label').className = 'label';
	}	
	
	if(empty(document.getElementById('email').value))
	{		
		document.getElementById('email_label').className = 'label_error';
		$error_inner += 'You must enter an email address<br>';
		$error_count++;		
	}
	else if(!email(document.getElementById('email').value))
	{
		document.getElementById('email_label').className = 'label_error';
		$error_inner += 'You must enter a valid email address<br>';
		$error_count++;
	}
	else
	{		
		document.getElementById('email_label').className = 'label';
	}	
	
	if(empty(document.getElementById('comments').value))
	{
		document.getElementById('comments_label').className = 'label_error';
		$error_inner += 'Please enter your question / comment<br>';
		$error_count++;
	}
	else
	{
		document.getElementById('comments_label').className = 'label';
	}

	$error_inner += '';
	
	if($error_count > 0)
	{
		document.getElementById('error_list').style.display = 'block';
		document.getElementById('error_list').innerHTML = $error_inner;		
		window.scrollTo(0, 0);
	}
	else
	{
		document.getElementById('error_list').style.display = 'none';
		document.getElementById('error_list').innerHTML = '';
		document.getElementById('contactusform').submit();	
	}
	
}