ranimg = new Array(); 
ranimg[0]="img/1.jpg"; 
ranimg[1]="img/2.jpg"; 
ranimg[2]="img/3.jpg"; 
ranimg[3]="img/4.jpg"; 
ranimg[4]="img/5.jpg"; 
ranimg[5]="img/6.jpg"; 
xx = Math.floor(ranimg.length*Math.random()); 
ranimg = ranimg[Math.floor(xx)]; 
document.write ('<style type="text/css"><!-- div.lft {background-image: url("'+ ranimg +'");background-repeat: no-repeat;margin:0px;padding:0px;}--></style>');