/* JS Anim im. bandeau pour PromoParcs 	*/
/* Grain de Sel le 02/04/2010 			*/

var aUrlIm = new Array();
aUrlIm[0] = '/actus-nouveautes/wp-content/themes/promoparcs/images/bandeau-img1.jpg'; 
aUrlIm[1] = '/actus-nouveautes/wp-content/themes/promoparcs/images/bandeau-img2.jpg'; 
aUrlIm[2] = '/actus-nouveautes/wp-content/themes/promoparcs/images/bandeau-img3.jpg'; 
aUrlIm[3] = '/actus-nouveautes/wp-content/themes/promoparcs/images/bandeau-img4.jpg'; 
aUrlIm[4] = '/actus-nouveautes/wp-content/themes/promoparcs/images/bandeau-img5.jpg'; 

var coef = 0.02; 
var temps = 30;
var temps_pause = 2500 ;
var nombre_image = 5; 
    
 // pas touche
 var indice = 2; // les 2 premiere image sont deja charger dans le HTML, on commence a la 3eme
 var isIE = navigator.userAgent.toLowerCase().indexOf('msie')!=-1 ;
 var img1 = null ;
 var img2 = null ;
 var sens = 1;
 var tabImg; // tab contenant les images

 function prechargerImg(){
 tabImg = new Array(nombre_image);
 for (i=0; i<=nombre_image -1; i++){
 tabImg[i]=new Image();
 tabImg[i].src = aUrlIm[i];
 }
 }

 function init()
 {
 img1 = document.getElementById("defilement1") ;
 img2 = document.getElementById("defilement2") ;

 prechargerImg();
 change_opacity();
 }

 function change_opacity()
 {
 var opacity1 = 0 ;
 var opacity2 = 0 ;

 if (isIE) // for IE
 { opacity1 = parseFloat(img1.filters.alpha.opacity);
 opacity2 = parseFloat(img2.filters.alpha.opacity);

 }
 else // for mozilla
 { opacity1 = parseFloat(img1.style.opacity);
 opacity2 = parseFloat(img2.style.opacity);
 }



 if (sens)
 { if (isIE) // for IE
 { img1.filters.alpha.opacity = opacity1 + coef * 100;
 img2.filters.alpha.opacity = opacity2 - coef * 100;

 }
 else // for Mozilla
 { img1.style.opacity = opacity1 + coef;
 img2.style.opacity = opacity2 - coef;
 }
 }
 else
 {
 if (isIE) // for IE
 { img1.filters.alpha.opacity = opacity1 - coef * 100;
 img2.filters.alpha.opacity = opacity2 + coef * 100;
 }
 else // for Mozilla
 { img1.style.opacity = opacity1 - coef;
 img2.style.opacity = opacity2 + coef;
 }
 }

 if (isIE) // for IE
 { opacity1 = parseFloat(img1.filters.alpha.opacity);
 opacity2 = parseFloat(img2.filters.alpha.opacity);
 }
 else // for mozilla
 { opacity1 = parseFloat(img1.style.opacity);
 opacity2 = parseFloat(img2.style.opacity);
 }

 // on fait varié le sens d'opacité du bazar
 if (opacity2 <= 0)
 { img2.src=tabImg[indice++].src;
 sens = 0;
 if (indice == (tabImg.length)) indice=0;
 window.setTimeout("change_opacity()",temps_pause) ; // attente
 return 0;
 }
 else if (opacity1 <= 0)
 { img1.src=tabImg[indice++].src;
 sens = 1;
 if (indice == (tabImg.length)) indice=0;
 window.setTimeout("change_opacity()",temps_pause) ; // attente
 return 0;
 }
 window.setTimeout("change_opacity()",temps) ; // recursion toutes les x millisec
 }