function show(val,img){
  var link=new Array(9);
  
  link[1]="tr1";
  link[2]="tr2";
  link[3]="tr3";
  link[4]="tr4";
  link[5]="tr5";
  link[6]="tr6";
  link[7]="tr7";
  link[8]="tr8";
  link[9]="tr9";

  for(var i=1;i<=9;i++){
    if(link[i]==val){
	 if(document.getElementById(link[i]).style.display=="")
	 {
	 document.getElementById(link[i]).style.display="none";
	 document.images[img].src="images/plus.gif";
	 }
	 else 
	 {
	 document.getElementById(link[i]).style.display="";
	 document.images[img].src="images/minus.gif";
	 }
	}
	else{
	  document.getElementById(link[i]).style.display="none";
	  /*alert("document.images['img"+[i]+"'].src='images/plus.gif'");*/
	  eval("document.images['img"+[i]+"'].src='images/plus.gif'");
	}
  }
  /*return false;*/
}