var indice_2 = 2; // les 2 premiere image sont deja charger dans le HTML, on commence a la 3eme
var img1_2 = null;
var img2_2 = null ;
var sens_2 = 1;
var prefix_image_2 = 'diaporama2/visuel'; // chemin + prefix du nom des images
var suffix_image_2 = '_2.jpg' ; // suffix + '.extension' du nom des images
var tabImg_2; // tab contenant les images
var emplacementGrand_2;
var emplacementPetit_2;

function prechargerImg_2(){
tabImg_2 = new Array(nombre_image);
for (p=0; p<=nombre_image -1; p++){
tabImg_2[p]=new Image();
tabImg_2[p].src = prefix_image_2+(p+1)+suffix_image_2;
}
}
function init_2()
{
img1_2 = document.getElementById("image2") ;
img2_2 = document.getElementById("image2_2") ;
prechargerImg_2();
change_opacity_2();
}
function change_opacity_2()
{
var opacity1_2 = 0 ;
var opacity2_2 = 0 ;
if (isIE) // for IE
{ opacity1_2 = parseFloat(img1_2.filters.alpha.opacity);
opacity2_2 = parseFloat(img2_2.filters.alpha.opacity);
}
else // for mozilla
{ opacity1_2 = parseFloat(img1_2.style.opacity);
opacity2_2 = parseFloat(img2_2.style.opacity);
}
if (sens_2)
{ if (isIE) // for IE
{ img1_2.filters.alpha.opacity = opacity1_2 + coef * 100;
img2_2.filters.alpha.opacity = opacity2_2 - coef * 100;
}
else // for Mozilla
{ img1_2.style.opacity = opacity1_2 + coef;
img2_2.style.opacity = opacity2_2 - coef;
}
}
else
{
if (isIE) // for IE
{ img1_2.filters.alpha.opacity = opacity1_2 - coef * 100;
img2_2.filters.alpha.opacity = opacity2_2 + coef * 100;
}
else // for Mozilla
{ img1_2.style.opacity = opacity1_2 - coef;
img2_2.style.opacity = opacity2_2 + coef;
}
}
if (isIE) // for IE
{ opacity1_2 = parseFloat(img1_2.filters.alpha.opacity);
opacity2_2 = parseFloat(img2_2.filters.alpha.opacity);
}
else // for mozilla
{ opacity1_2 = parseFloat(img1_2.style.opacity);
opacity2_2 = parseFloat(img2_2.style.opacity);
}
// on fait varié le sens d'opacité du bazar
if (opacity2_2 <= 0)
{ img2_2.src=tabImg_2[indice_2++].src;
sens_2 = 0;
if (indice_2 == (tabImg_2.length)) indice_2=0;
window.setTimeout("change_opacity_2()",temps_pause) ; // attente
return 0;
}
else if (opacity1_2 <= 0)
{ img1_2.src=tabImg_2[indice_2++].src;
sens_2 = 1;
if (indice_2 == (tabImg_2.length)) indice_2=0;
window.setTimeout("change_opacity_2()",temps_pause) ; // attente
return 0;
}
window.setTimeout("change_opacity_2()",temps) ; // recursion toutes les x millisec
if (opacity1_2 <= 0.5 || opacity2_2 >= 0.5)
{
imagetest_2 = "image2_2";
imagetest_BIG_2 = "image2_2_BIG"
emplacementPetit_2 = document.getElementById(imagetest_2).src;
tableau_2 = emplacementPetit_2.split("diaporama2") 
emplacementGrand_2 = "diaporama2_BIG" + tableau_2[1];

document.getElementById(imagetest_BIG_2).href = emplacementGrand_2;
clik_2 = document.createAttribute("onClick");
clik_2.nodeValue = "return enlarge(emplacementGrand_2,event)";
document.getElementById(imagetest_BIG_2).setAttributeNode(clik_2);
}
if (opacity1_2 >= 0.5 || opacity2_2 <= 0.5)
{
imagetest_2 = "image2";
imagetest_BIG_2 = "image2_BIG"
emplacementPetit_2 = document.getElementById(imagetest_2).src;
tableau_2 = emplacementPetit_2.split("diaporama2") 
emplacementGrand_2 = "diaporama2_BIG" + tableau_2[1];

document.getElementById(imagetest_BIG_2).href = emplacementGrand_2;
clik_2 = document.createAttribute("onClick");
clik_2.nodeValue = "return enlarge(emplacementGrand_2,event)";
document.getElementById(imagetest_BIG_2).setAttributeNode(clik_2);
}
}