function DFonlyThisChars(numbers,letters,others,e){
	if(window.event)key=window.event.keyCode
	else if(e)key=e.which
	else return true
	S=(others)?others:''
	if(numbers)S+='0123456789'
	if(letters)S+='abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
	if(key==null||key==0||key==8||key==9||key==13||key==27)return true
	else if(S.indexOf(String.fromCharCode(key))!=-1)return true
	else return false
   }