function CheckStr(strOriginal, strFind, strChange){
   var position, strOri_Length;
   position = strOriginal.indexOf(strFind);
   while (position != -1) {
      strOriginal = strOriginal.replace(strFind, strChange);
      position = strOriginal.indexOf(strFind);
   }
   strOri_Length = strOriginal.length;
   return strOri_Length;
}

function check_space(str) {
   if (str.search(/\S/)<0) {
      return false;
   }
   var temp=str.replace(' ','');
   if (temp.length == 0) {
      return false;
   }
   return true;
}