function rand( min, max ) {
	if( max ) {
		return Math.floor(Math.random() * (max - min + 1)) + min;
	} else {
		return Math.floor(Math.random() * (min + 1));
	}
}

function changeBanner(){
	
	//var bannerId = rand(1, 5);
	var bannerId = 1;
	document.getElementById('banner').style.backgroundImage = "url('resources/bestanden/banner/banner"+bannerId+".jpg')";

}

function checkAndSubmit(fieldsToCheck, formName, formID){

	var errors = 0;
	
	for (var index = 0; index < fieldsToCheck.length; index++){
	
		if(getObject(fieldsToCheck[index]).value.length == 0){
		
	  		errors++;	
			
			if(errors == 1){
				
				getObject(fieldsToCheck[index]).focus();
				
			}
			
			getObject(fieldsToCheck[index]).style.border     = "1px solid #CC0000";
			getObject(fieldsToCheck[index]).style.background = "##FFF9F9";	
	
		}
	}
	
	if(errors == 0){
		if(formID == 1){
			if(getObject('password').value != getObject('password2').value){
				alert('De wachtwoorden komen niet overeen!');
			}else{
				document.forms[formName].submit();
			}
		}else{
			document.forms[formName].submit();
		}
	}else{
			
		alert('U dient ten minste de rood gemarkeerde velden in te vullen.');
	
	}

}

function getObject(element){

	return document.getElementById(element);
	
}