function chgPic(showPic){

var myPic = new Array;
myPic[0] = new Image; myPic[0].src = "img/main_terasse_1.jpg";
myPic[1] = new Image; myPic[1].src = "img/main_terasse_2.jpg";

if(!showPic){
	var showPic = myPic[0].src;
}
else{
	if(showPic == myPic[0].src){
		showPic = myPic[1].src;
	}
	else{
		showPic = myPic[0].src;
	}
};
document.images.pic.src = showPic;

newtime = window.setTimeout("chgPic('"+showPic+"');",6000);
};