/* $Id$ */

function checkContactForm(form)
{
	return checkInput("form_name","Please enter your name.") &&
		checkEmail("form_email","Please enter e-mail.")&&
		checkTextarea("form_message","Please enter message.");
}

function checkNLSubscribeForm(form)
{
	return checkEmail("form_nl_subscribe_email","Please enter e-mail.");
}

function checkNLUnsubscribeForm(form)
{
	return checkEmail("form_nl_unsubscribe_email","Please enter e-mail.");
}

/* ----------------------------------------------------------------------
	DEFAULT VALIDATION FORMS
---------------------------------------------------------------------- */
function checkInput(inputId, errorMessage)
{
	var input = document.getElementById(inputId);
	if(!input)
	{
		alert( "Input " + inputId + " not found!");
		return false;
	}

	if( input.value == "" )
    	return focusFailedInput(inputId,errorMessage);
     
    return true;
}

function compareFields(fieldId1, fieldId2, errorMessage)
{
	var field1 = document.getElementById(fieldId1);
	if(!field1)
	{
		alert( "Element " + fieldId1 + " not found!");		
		return false;
	}

	var field2 = document.getElementById(fieldId2);
	if(!field2)
	{
		alert( "Element " + fieldId2 + " not found!");		
		return false;
	}

	if( field1.value != field2.value )
    	return focusFailedInput(fieldId2,errorMessage);
     
    return true;
}

function checkTextarea(inputId, errorMessage)
{
	var input = document.getElementById(inputId);
	if(!input)
	{
		alert( "Textarea " + inputId + " not found!");		
		return false;
	}

	if( input.value.length <= 3 )
    	return focusFailedInput(inputId,errorMessage);
     
    return true;
}

function checkEmail(inputId,errorMessage)
{
	var input = document.getElementById(inputId);
	if(!input)
	{
		alert( "Input " + inputId + " not found!");
		return false;
	}

    if (!isValidEmail(input.value)) 
    {
        focusFailedInput(inputId,errorMessage);
        return false;
    }

    return true;
}

function isValidEmail(email)
{
 	var template = /^[0-9a-z]+[0-9a-z._-]*\@[0-9a-z]+[0-9a-z._-]*\.[0-9a-z]{2,}$/i;
  	if (template.test(email) == false) return false;
	return true;
}

function clearError()
{
	var labels = document.getElementsByTagName("label");
	
	for(var i = 0; i < labels.length; i++ )
	{
		var label = labels[i];
		label.className = label.className.replace("error", "");
	}
	return true;
}

function focusFailedInput(inputId, errorMessage)
{
	var labels = document.getElementsByTagName("label");

	var tmplabel;
	// set error class to correct label and remove error class from others
	for(var i = 0; i < labels.length; i++ )
	{
		var label = labels[i];
		label.className = label.className.replace("error", "");
		// if anything will be wrong, remove break statement
		if( label.htmlFor == inputId ) { label.className += " error"; break; }
	}
	
	if(errorMessage)
		alert(errorMessage);
		
	var element = document.getElementById(inputId);
	if(element)
	{
		element.onchange = clearError;
		element.focus();
	}
	
	return false;
}

function checkRadio(form, input, errorMessage, inputId)
{
	var i = 0;
	for( i ; i < form[input].length; i++ )
		if(form[input][i].checked == true) break;
	
	var tmp = inputId ? inputId : tmp;
	if( i == form[input].length )
    	return focusFailedInput(tmp,errorMessage);
     
    return true;
}