var indice_3 = 2; // les 2 premiere image sont deja charger dans le HTML, on commence a la 3eme
var img1_3 = null;
var img2_3 = null ;
var sens_3 = 1;
var prefix_image_3 = 'diaporama3/visuel'; // chemin + prefix du nom des images
var suffix_image_3 = '_3.jpg' ; // suffix + '.extension' du nom des images
var tabImg_3; // tab contenant les images
var emplacementGrand_3;
var emplacementPetit_3;


function prechargerImg_3(){
tabImg_3 = new Array(nombre_image);
for (m=0; m<=nombre_image -1; m++){
tabImg_3[m]=new Image();
tabImg_3[m].src = prefix_image_3+(m+1)+suffix_image_3;
}
}
function init_3()
{
img1_3 = document.getElementById("image3") ;
img2_3 = document.getElementById("image3_2") ;
prechargerImg_3();
change_opacity_3();
}
function change_opacity_3()
{
var opacity1_3 = 0 ;
var opacity2_3 = 0 ;
if (isIE) // for IE
{ opacity1_3 = parseFloat(img1_3.filters.alpha.opacity);
opacity2_3 = parseFloat(img2_3.filters.alpha.opacity);
}
else // for mozilla
{ opacity1_3 = parseFloat(img1_3.style.opacity);
opacity2_3 = parseFloat(img2_3.style.opacity);
}
if (sens_3)
{ if (isIE) // for IE
{ img1_3.filters.alpha.opacity = opacity1_3 + coef * 100;
img2_3.filters.alpha.opacity = opacity2_3 - coef * 100;
}
else // for Mozilla
{ img1_3.style.opacity = opacity1_3 + coef;
img2_3.style.opacity = opacity2_3 - coef;
}
}
else
{
if (isIE) // for IE
{ img1_3.filters.alpha.opacity = opacity1_3 - coef * 100;
img2_3.filters.alpha.opacity = opacity2_3 + coef * 100;
}
else // for Mozilla
{ img1_3.style.opacity = opacity1_3 - coef;
img2_3.style.opacity = opacity2_3 + coef;
}
}
if (isIE) // for IE
{ opacity1_3 = parseFloat(img1_3.filters.alpha.opacity);
opacity2_3 = parseFloat(img2_3.filters.alpha.opacity);
}
else // for mozilla
{ opacity1_3 = parseFloat(img1_3.style.opacity);
opacity2_3 = parseFloat(img2_3.style.opacity);
}
// on fait varié le sens d'opacité du bazar
if (opacity2_3 <= 0)
{ img2_3.src=tabImg_3[indice_3++].src;
sens_3 = 0;
if (indice_3 == (tabImg_3.length)) indice_3=0;
window.setTimeout("change_opacity_3()",temps_pause) ; // attente
return 0;
}
else if (opacity1_3 <= 0)
{ img1_3.src=tabImg_3[indice_3++].src;
sens_3 = 1;
if (indice_3 == (tabImg_3.length)) indice_3=0;
window.setTimeout("change_opacity_3()",temps_pause) ; // attente
return 0;
}
window.setTimeout("change_opacity_3()",temps) ; // recursion toutes les x millisec
if (opacity1_3 <= 0.5 || opacity2_3 >= 0.5)
{
imagetest_3 = "image3_2";
imagetest_BIG_3 = "image3_2_BIG"
emplacementPetit_3 = document.getElementById(imagetest_3).src;
tableau_3 = emplacementPetit_3.split("diaporama3") 
emplacementGrand_3 = "diaporama3_BIG" + tableau_3[1];

document.getElementById(imagetest_BIG_3).href = emplacementGrand_3;
clik_3 = document.createAttribute("onClick");
clik_3.nodeValue = "return enlarge(emplacementGrand_3,event)";
document.getElementById(imagetest_BIG_3).setAttributeNode(clik_3);
}
if (opacity1_3 >= 0.5 || opacity2_3 <= 0.5)
{
imagetest_3 = "image3";
imagetest_BIG_3 = "image3_BIG"
emplacementPetit_3 = document.getElementById(imagetest_3).src;
tableau_3 = emplacementPetit_3.split("diaporama3") 
emplacementGrand_3 = "diaporama3_BIG" + tableau_3[1];

document.getElementById(imagetest_BIG_3).href = emplacementGrand_3;
clik_3 = document.createAttribute("onClick");
clik_3.nodeValue = "return enlarge(emplacementGrand_3,event)";
document.getElementById(imagetest_BIG_3).setAttributeNode(clik_3);
}
}