function trim(str){
   return str.replace(/^\s*|\s*$/g,"");
 }

 function validKeys(){
  //valida ingreso valores numericos, minusculas, mayusculas, acentos(5),+-@.#ρΡ&'
  if ((event.keyCode>=48 && event.keyCode<=57) || (event.keyCode>=97 && event.keyCode<=122)  || (event.keyCode>=65 && event.keyCode<=90) || event.keyCode==225 || event.keyCode==233  || event.keyCode==237 || event.keyCode==243  || event.keyCode==250  || event.keyCode==43 || event.keyCode==45 || event.keyCode==64 || event.keyCode==46 || event.keyCode==35 || event.keyCode==241 || event.keyCode==209 || event.keyCode==38 || event.keyCode==39 || event.keyCode==32 ){
   return;}
  else{event.keyCode = 0;}
 }