var nbimage= 40;
					var width;
					var height;
					var url;
					var alte;
					function banniere()
					{
					numimage= Math.round(Math.random()*(nbimage-1)+1);
					if (numimage <= 10)
					{
					gotosite = "";
					url = "images/PHOTO5.jpg";
					alte = "COMPTA1";
					}
					if (numimage > 10 && numimage <= 20)
					{
					gotosite = "";
					url = "images/PHOTO6.jpg";
					alte = "BOURSE";
					}
					if (numimage > 20 && numimage <= 30)
					{
					gotosite = "";
					url = "images/PHOTO7.jpg";
					alte = "COMPTA";
					}
					if (numimage > 30)
					{
					gotosite = "";
					url = "images/PHOTO8.jpg";
					alte = "CLAVIER";
					}
					if(gotosite != "")
								{
								document.write ('<a href="' + gotosite + '">');	
								}
					document.write('<img src="' + url + '" alt="' + alte + '" border=0>')
					if(gotosite != "")
								{
								document.write('</a>')
								}
					}