function $(id)
{
	return document.getElementById(id);
} // $


function is_empty(str)
{
	return ( str==null || str==0 || str=="" || str.length<1 );
} // is_empty



function is_numeric(str)
{
	regularExp = new RegExp("^[0-9-.]*$");
	return regularExp.test(str);
} // is_numeric



function is_email(str)
{
	return ( ( str.indexOf("@")>0 ) && ( str.indexOf(".")>0 ) );
} // is_email


function clear_form(frm) {
	frm.reset();
} //clear_form




function toggleCommentForm()
{
	var o = $('divComment');
	if ( o!=null )
	{
		if ( o.style.display=='' )
		{
			o.style.display = 'none';
			$('newComment').value = 'Add comment';
		}
		else
		{
			o.style.display = '';
			$('newComment').value = 'Hide Comment Form';
		}
	} // if
} // toggleCommentForm




function deleteElement(id)
{
	if ( $(id)!=null )
	{
		$(id).parentNode.removeChild($(id));
	} // if
} // deleteElement



function contentArticleVerification()
{

	var obj = document.frm_addContent;
	var finalMessage = "";
	var isOk = true;

	if ( is_empty(obj.id_category.value) )
	{
		finalMessage += "* Choose a title.\n";
		isOk = false;
	}
	
	if ( is_empty(obj.id_content_type.value) )
	{
		finalMessage += "* Choose a content type.\n";
		isOk = false;
	}

	if ( is_empty(obj.gender.value) )
	{
		finalMessage += "* Choose a gender.\n";
		isOk = false;
	}
	
	if ( is_empty(obj.visitorName.value) )
	{
		finalMessage += "* Please check nickname.\n";
		isOk = false;
	}
	
	if ( is_empty(obj.visitorEmail.value) )
	{
		finalMessage += "* Please check your email.\n";
		isOk = false;
	}			
	
	
	if ( is_empty(obj.title.value) )
	{
		finalMessage += "* Please check your article title.\n";
		isOk = false;
	}
	
	if ( is_empty(obj.description.value) )
	{
		finalMessage += "* Please check your article description.\n";
		isOk = false;
	}

	if ( is_empty(obj.code.value) )
	{
		finalMessage += "* Please check your code.\n";
		isOk = false;
	}
	if ( isOk==false )
	{
		alert("It seems there''s a problem sending the information, please take a look to the following error(s):\n\n"+finalMessage);
		return false;
	}
	else {
		return true;
	}

} // contentArticleVerification




function contentCommentVerification()
{

	var obj = document.frm_addComment;
	var finalMessage = "";
	var isOk = true;

	if ( is_empty(obj.id_content.value) )
	{
		finalMessage += "* Choose a title.\n";
		isOk = false;
	}

	if ( is_empty(obj.gender.value) )
	{
		finalMessage += "* Choose a gender.\n";
		isOk = false;
	}
	
	if ( is_empty(obj.visitorName.value) )
	{
		finalMessage += "* Please check nickname.\n";
		isOk = false;
	}
	
	if ( is_empty(obj.visitorEmail.value) )
	{
		finalMessage += "* Please check your email.\n";
		isOk = false;
	}			
	
	if ( is_empty(obj.visitorUrl.value) )
	{
		finalMessage += "* Please check your url.\n";
		isOk = false;
	}
	
	if ( is_empty(obj.visitorComment.value) )
	{
		finalMessage += "* Please check your comment.\n";
		isOk = false;
	}

	if ( is_empty(obj.code.value) )
	{
		finalMessage += "* Please check your code.\n";
		isOk = false;
	}
	if ( isOk==false )
	{
		alert("It seems there''s a problem sending the information, please take a look to the following error(s):\n\n"+finalMessage);
		return false;
	}
	else {
		return true;
	}

} // contentCommentVerification




// fuction to use target blank in xhtml strict
function transformExternalAnchors()
{
	var i,a,f;
	if ( document.getElementsByTagName )
	{

		a = document.getElementsByTagName("a");
		i = 0;

		// for using in normal href tag, you you have to add: rel="external"
		// example: <a href="http://affiliate.dptsportsgroup.com" rel="external">Affiliate program</a>
		for(i=0;i<a.length;i++)
		{
			if ( a[i].getAttribute('href') && ( a[i].getAttribute("rel")=="external" ) )
			{
				a[i].target = "_blank";
			}
		} // for

		f = document.getElementsByTagName("form");
		i = 0;

		// for using in forms, you have to add in the form tag: title="external"
		// example: 		<form action=# id="frmId" title="external"></form>
		for(i=0;i<f.length;i++)
		{
			if ( f[i].getAttribute('action') && ( f[i].getAttribute("title")=="external" ) )
			{
				f[i].target = "_blank";
			}
		} // for
	} // if
} // transformExternalAnchors



window.onload = transformExternalAnchors;