function ejs_aff_dossier() { // Position aléatoire des grandes diapo
				 document.getElementById("fondiap").style.left = 100-(pos_x) +"px"; // "px" pour compatibilité avec les DOCTYPE
				 document.getElementById("fondiap").style.top= 100+(pos_y) +"px";
				 document.getElementById("diapos").style.left = (100-(pos_x))+111 +"px";
				 document.getElementById("diapos").style.top = (100+(pos_y))+78 +"px";
				 document.getElementById("titre").style.left = (100-(pos_x))+153 +"px";
				 document.getElementById("titre").style.top = (100+(pos_y))+312 +"px";
				 document.getElementById("numero").style.left = (100-(pos_x))+255 +"px";
				 document.getElementById("numero").style.top = (100+(pos_y))+310 +"px";
}
// FROM http://www.brainerror.net/scripts_js_blendtrans.php
function opacity(id, opacStart, opacEnd, millisec) {
				 //speed for each frame
				 var speed = Math.round(millisec / 100);
				 var timer = 0;
    		 //determine the direction for the blending, if start and end are the same nothing happens
    		 if(opacStart > opacEnd) {
         							for(i = opacStart; i >= opacEnd; i--) {
            								setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            								timer++;
         							}
    		 } else if(opacStart < opacEnd) {
         	 			for(i = opacStart; i <= opacEnd; i++) {
            					setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
           						 timer++;
        			  }
    		 }
}
//change the opacity for different browsers
function changeOpac(opacity, id) {
    var object = document.getElementById(id).style;
    object.opacity = (opacity / 100);
    object.MozOpacity = (opacity / 100);
    object.KhtmlOpacity = (opacity / 100);
    object.filter = "alpha(opacity=" + opacity + ")";
}