if (document.images) {
fon = new Image

  ser_pv = new Image
 ser_pvg = new Image
 ser_a = new Image
 ser_dt = new Image



  ser_pv.src = "images/pvpvg/pv_on.gif"
 ser_pvg.src = "images/pvpvg/pvg.gif"
 ser_a.src = "images/a/ser_a.jpg"
 ser_dt.src = "images/dt/ser_dt.gif"

    fon.src =  "images/pogr.jpg"

    fon.src =  "images/pusto.gif"
}
else {   ser_pv = ""
        ser_pvg = ""
        ser_a = ""
        ser_dt = ""
        
           fon = ""
	   document.croc = ""
	   }
	  

if (document.images) {
fon = new Image

fon.src =  "images/pogr.jpg"

}
else { 	   fon = ""
	   document.croc = ""
	   }