var num = 0;var nbreImages = 5;function precedente(){num += -1;if (num <= 0) {num = nbreImages}document.images[0].src = "img"+num+".jpg";afficher(num)}function suivante() {num += 1;if (num == (nbreImages+1)) {num = 1}document.images[0].src = "nid-guepes"+num+".jpg";afficher(num)} function afficher(num) {if (num==1)phrase="1 - Le nid"; if (num==2)phrase="2 - D&eacute;tails";if (num==3)phrase="3 - Orifices";if (num==4)phrase="4 - Alv&eacute;oles";
if (num==5)phrase="5 - Alv&eacute;oles";  insertion="<img src='nid-guepes" + num + ".jpg' height='453' alt='Nid de guepe' title='Nid de gu&ecirc;pes'>";extrait="<p>" + phrase + "</p>";num=document.getElementById('photo'); phrase=document.getElementById('legende');num.innerHTML=insertion;phrase.innerHTML=extrait;}