// RollOver
		function over1(){
			if (document.images)
				document.button1.src = "images/navigation/info_a.gif"
		}
		function over2(){
			if (document.images)
				document.button2.src = "images/navigation/team_a.gif"
		}
		function over3(){
			if (document.images)
				document.button3.src = "images/navigation/praxis_a.gif"
		}
		function over4(){
			if (document.images)
				document.button4.src = "images/navigation/kontakt_a.gif"
		}
		
	// RollOut
		function out1(){
			if (document.images)		
				document.button1.src = "images/navigation/info_p.gif"
		}
		function out2(){
			if (document.images)		
				document.button2.src = "images/navigation/team_p.gif"
		}
		function out3(){
			if (document.images)		
				document.button3.src = "images/navigation/praxis_p.gif"
		}
		function out4(){
			if (document.images)		
				document.button4.src = "images/navigation/kontakt_p.gif"
		}