function showbannermain(id)
  {
	var ar=new Array();
	ar[0]="1.gif";
	ar[1]="2.gif";
	ar[2]="3.gif";
	ar[3]="4.jpg";
	var rnumber=Math.floor(Math.random()*4)
	document.getElementById(id).innerHTML="<img src='http://www.alcoholrehab.net/images/" + ar[rnumber] + "'>";
  }
  function showbannerside(id)
  {
	var ar=new Array();
	ar[0]="s1.gif";
	ar[1]="s2.gif";
	ar[2]="s3.gif";
	ar[3]="s4.gif";
	ar[4]="s5.gif";
	ar[5]="s6.gif";
	ar[6]="s7.gif";
	ar[7]="s8.gif";
	ar[8]="s9.gif";
	var rnumber=Math.floor(Math.random()*9)
	document.getElementById(id).innerHTML="<img src='http://www.alcoholrehab.net/images/" + ar[rnumber] + "'>";
  }