nombrediv=105;
		nombreimagesfond=7;
		nombrecolor=5;
		nombrepngmotif=6;
		
		
		chiffre=(Math.floor((nombreimagesfond)*Math.random()+1));	
		imagefond ='<div class="motif01 fleur'+chiffre+'"></div>'
		var bloc="";


		colorback = function()
		{
		randcolor="";
		randpng="";
		palette="";
		color=""
		
		var palette=Math.floor(Math.random()*7);
		switch (palette)
		{
		  case 0:
			var color = ["#814700", "#C74700", "#E49F00", "#FFDE97", "#F94618"]; // libellule
			break;
		  case 1:
			var color = ["#787A00", "#58C61B", "#4FA900", "#EBDF00", "#D17500"]; // libellule
			break;
		  case 2:
			var color = ["#622E00", "#FF0000", "#FFFFFF", "#FEB99F", "#B4CB00"]; // fraise
			break;
		  case 3:
			var color = ["#3D4844", "#C2115A", "#F0158A", "#F9A0D4", "#77AB79"]; // rose
			break;
		  case 4:
			var color = ["#12430A", "#00C000", "#FFFFFF", "#C0FF9C", "#EAF700"]; // bouton d'or
			break;
		  case 5:
			var color = ["#210000", "#7C0500", "#BD2D00", "#FFB500", "#FFDE7A"]; // lotus
			break;
		  case 6:
			var color = ["#DC0032", "#FF0072", "#EB0097", "#FFFAFF", "#4D0032"]; // queen of the snow
			break;
		  case 7:
			var color = ["#765F2C", "#CCB400", "#FFFFFF", "#D1CCB4", "#B74700"]; // orchidee
			break;
		}

		var png = [1,2,3,4,5,6];
    	
		for (var i=1; i<nombrediv; i++) 
			{
				var rand1=Math.floor(Math.random()*nombrepngmotif);
				randpng=png[rand1];
				blocs= "<div class='transp"+randpng+"' id='carre"+i+"' ></div>";
				//blocs= "<div id='carre"+i+"'><img src='images/transp"+randpng+".png' alt='' border='0'/></div>";
				bloc=bloc+blocs;
			}	
		document.getElementById('fond').innerHTML= bloc			
		for (var i=1; i<nombrediv; i++) 								
			{
				var rand=Math.floor(Math.random()*nombrecolor);
				randcolor=color[rand];
				document.getElementById("carre"+i).style.backgroundColor=randcolor
			}		
		}
			var chemin = "images/";
		var ext = ".png";
		var liste_images = new Array('fleur1','fleur2','fleur3','transp1','transp2','transp3','transp4','transp5','transp6','transp7');
		document.image_chargee = new Array();
		
		function prechargement() 
		{
			for ( i = 0; i < liste_images.length; i++ )
			{
			document.image_chargee[i] = new Image;
			document.image_chargee[i].src = chemin + liste_images[i] + ext;
			}
		}

		function setOpacity(value) {
			this.style.opacity = value/10;
			this.style.filter = 'alpha(opacity=' + value*10 + ')';
		}