function checkForm(formID)
{
	myForm = document.getElementById(formID);
	if (typeof(myForm) != "object") return false;
	myElements = myForm.elements;
	myError = new Array();
	for (f=0; f<myElements.length; f++){
	   myElement = myElements[f];
	   if (myElement.id.indexOf('_req') != -1){
		   // REQUIRED FIELD
		   if (myElement.id.indexOf('_em') != -1){
				   if(myElement.value == "" || myElement.value.indexOf('@') == -1 || myElement.value.lastIndexOf('.') <= myElement.value.indexOf('@')){
					   myError.push(myElement);
				   }
		   } else if (myElement.value == "" || (myElement.type == "checkbox" && myElement.checked != true)) {
			   myError.push(myElement);
		   }
	   }
	}
	if (myError.length > 0){
		alert("Bitte füllen Sie alle Pflichtfelder aus!");
		myError[0].focus();
		return false;
	} else { 
		return true;
	}
	return false;
}
function over(id,name)
{
	document.getElementById(id).src='images/dynamic/nav_a/'+name.toUpperCase()+'/img.gif';
	if(document.getElementById('sub'+id) != null)
	{
		document.getElementById('sub'+id).style.display = 'block';
	}
}
function out(id,name,active)
{
	if(active != 1)
	{
		document.getElementById(id).src='images/dynamic/nav/'+name.toUpperCase()+'/img.gif';
	}
	if(document.getElementById('sub'+id) != null)
	{
		document.getElementById('sub'+id).style.display = 'none';
	}
}
function sub_over(id)
{
	document.getElementById('row'+id).style.backgroundColor = "#c20000";
	document.getElementById('a'+id).style.color = "#ffffff";
}
function sub_out(id)
{
	document.getElementById('row'+id).style.backgroundColor = "#ffffff";
	document.getElementById('a'+id).style.color = "#c20000";
}
function set_size(size)
{
	document.getElementById('c_title').style.fontSize = size+'px';
	document.getElementById('c_teaser').style.fontSize = size+'px';
	document.getElementById('c_text').style.fontSize = size+'px';
	
	if(size == 11)
	{
		document.getElementById('sel_1').style.textDecoration = 'underline';
		document.getElementById('sel_2').style.textDecoration = 'none';
		document.getElementById('sel_3').style.textDecoration = 'none';
	}
	if(size == 13)
	{
		document.getElementById('sel_1').style.textDecoration = 'none';
		document.getElementById('sel_2').style.textDecoration = 'underline';
		document.getElementById('sel_3').style.textDecoration = 'none';
	}
	if(size == 15)
	{
		document.getElementById('sel_1').style.textDecoration = 'none';
		document.getElementById('sel_2').style.textDecoration = 'none';
		document.getElementById('sel_3').style.textDecoration = 'underline';
	}
}

function slideshow(){
	var active = jQuery('div#head_slider').find('.active');
	
	if ( active.length == 0 ) active = jQuery('div#head_slider IMG:first');
	
	var sibs  = active.siblings();
	var rndNum = Math.floor(Math.random() * sibs.length );
	var next  = jQuery( sibs[ rndNum ] );
	
	//var next = active.next().length ? active.next() : jQuery('div#head_slider IMG:first');
	
	active.addClass('last-active');
	
	next.css({opacity: 0.0})
        .addClass('active')
        .animate({opacity: 1.0}, 500, function() {
            active.removeClass('active last-active');
        });
	


}

$(document).ready(function(){
	setInterval( "slideshow()", 5000 );
	
	
});