/* follow div */
var picture_div_name; 
var picture_follow_off_X = 15;     
function init_follow_picture(name,off)
{
	if (document.getElementById(name))
	{
		if (off == 1)
			picture_follow_off_Y = -200;
		else if (off == 2)
			picture_follow_off_Y = -330;
		else if (off == 3)
			picture_follow_off_Y = -460;
			
		picture_div_name = name; 
	}
}
function unset_follow_picture(name)
{
	if (document.getElementById(name))
	{
		var obj = document.getElementById(name).style; 
		obj.visibility = 'hidden';		
	}		
	picture_div_name = ''; 
}

function follow_picture_mouse_X(evt) {if (!evt) evt = window.event; if (evt.pageX) return evt.pageX; else if (evt.clientX)return evt.clientX + (document.documentElement.scrollLeft ?  document.documentElement.scrollLeft : document.body.scrollLeft); else return 0;}
function follow_picture_mouse_Y(evt) {if (!evt) evt = window.event; if (evt.pageY) return evt.pageY; else if (evt.clientY)return evt.clientY + (document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop); else return 0;}

function follow(evt) 
{
	if (picture_div_name)
	{
		if (document.getElementById) 
		{
			var obj = document.getElementById(picture_div_name).style; 
			obj.visibility = 'visible';
			obj.left = (parseInt(follow_picture_mouse_X(evt))+picture_follow_off_X) + 'px';
			obj.top = (parseInt(follow_picture_mouse_Y(evt))+picture_follow_off_Y) + 'px';
		}
	}
}		
		
function show_bild(grafik)
{
	document.getElementById("texttab").style.display = "none";
	document.getElementById(grafik).style.display = "inline";
}
function hide_bild(grafik)
{		
	document.getElementById(grafik).style.display = "none";
	document.getElementById("texttab").style.display = "inline";
}
function check_submit()
{
	var email = document.email.email_adresse.value;
	var ergebnis = email.search(/@/);
	if (!document.email.email_betreff.value)
		ergebnis = -1;
	if (!document.email.email_name.value)
		ergebnis = -1;
	if (!document.email.email_nachricht.value)
		ergebnis = -1;
	if (ergebnis != -1)  				
		document.email.submit();
	else
		alert ("Bitte füllen Sie das Formular vollständig aus!");
}