var refchk = document.referrer;
var engname = "Ref_Search";
if(refchk){ 
  var searchchar = new Array ('yahoo','google','msn');
  for (x=0; x<searchchar.length; x++) {
    newengine = searchchar[x];
	var pat = eval('/'+newengine+'/');  
    if(pat.test(refchk)) {
	  var engvalue = newengine + "||" + refchk;  
      var refCookie = engname + "=" + escape(engvalue);
      document.cookie = refCookie; 
	}  
  }
}