var retval = 0;

    
    if (navigator.appName == 'Microsoft Internet Explorer')
    {
        retval = 1;
        
       document.write("<link rel = 'stylesheet' type = 'text/css' href = 'ie_style.css'>");
    }
    else
      
       document.write("<link rel = 'stylesheet' type = 'text/css' href = 'ns_style.css'>");


    function openwindow(instr)
  {
var newwin =window.open(instr, null,"width=750,height=600,scrollbars=1,resizable=1,status=1,menubar=0,toolbar=0,titlebar=1");
   }