if (document.images){
  nav1_off = new Image();  nav1_off.src = view_path+"images/nav1.gif";
  nav1_on =  new Image();  nav1_on.src =  view_path+"images/nav1_on.gif";
  nav2_off = new Image();  nav2_off.src = view_path+"images/nav2.gif";
  nav2_on =  new Image();  nav2_on.src =  view_path+"images/nav2_on.gif";
  nav3_off = new Image();  nav3_off.src = view_path+"images/nav3.gif";
  nav3_on =  new Image();  nav3_on.src =  view_path+"images/nav3_on.gif";
  nav4_off = new Image();  nav4_off.src = view_path+"images/nav4.gif";
  nav4_on =  new Image();  nav4_on.src =  view_path+"images/nav4_on.gif";
  nav5_off = new Image();  nav5_off.src = view_path+"images/nav5.gif";
  nav5_on =  new Image();  nav5_on.src =  view_path+"images/nav5_on.gif";
  nav6_off = new Image();  nav6_off.src = view_path+"images/nav6.gif";
  nav6_on =  new Image();  nav6_on.src =  view_path+"images/nav6_on.gif";
  nav7_off = new Image();  nav7_off.src = view_path+"images/nav7.gif";
  nav7_on =  new Image();  nav7_on.src =  view_path+"images/nav7_on.gif";
}

function roll(sname,rname){
    sname = id2elem(sname);
    sname.src = rname.src;
}
function id2elem(id) {
	if (typeof(id) != 'string') {
		return id;
	}
	if (document.getElementById) {
		id = document.getElementById(id);
	} else if (document.all) {
		id=document.all[id];
	} else {
		id = null;
	}
	return id;
}
function popup(url,width,height){
    nw = window.open(url,"newwindow","width="+width+",height="+height+",status=0,toolbar=0,menubar=0,scrollbars=1,resizable=1,location=0");
    nw.focus();
}
function faq(q,t){
  for(i=1;i<=t;i++){
    
    e = id2elem("q"+i);
    e.style.display = "none";
  }
  e_on = id2elem("q"+q);
  e_on.style.display = "block";
}
function isNumeric(sText)

{
   var ValidChars = "0123456789.";
   var IsNumber=true;
   var Char;

 
   for (i = 0; i < sText.length && IsNumber == true; i++) 
      { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) 
         {
         IsNumber = false;
         }
      }
   return IsNumber;
   
   }