function search() {
  if (document.cerca.ins.value == "") { alert("Inserisci un termine da cercare!");}
  else if (document.cerca.motor.selectedIndex == 0) { alert("Seleziona un motore!");}
  else {
   var pgs = new Array()
   pgs[1] = "http://it.altavista.com/q?q="
   pgs[2] = "http://search-arianna.iol.it/abin/search?query="
   pgs[3] = "http://www.excite.it/cerca/web/risultati?search="
   pgs[4] = "http://www.godado.it/godado.pperl?Keywords="
   pgs[5] = "http://www.hotbot.lycos.it/result.html?query="
   pgs[6] = "http://janas-search.tiscali.it/searchbin/webSearch.pl?query="
   pgs[7] = "http://www.lycos.it/cgi-bin/pursuit?query="
   pgs[8] = "http://search.metacrawler.com/crawler?general="
   pgs[9] = "http://search.msn.it/results.asp?q="
   pgs[10] = "http://search.supereva.it/cgi-bin/gsearch.chm?q="
   pgs[11] = "http://search.virgilio.it/search/cgi/search.cgi?qs="
   pgs[12] = "http://www.google.it/search?q="
   window.open (pgs[document.cerca.motor.selectedIndex] + document.cerca.ins.value)
  }
 }