// JScript File

function CheckEnglishOnly(field)
    
    {
        var sNewVal = "";
        var sFieldVal = field.value;
        
        for(var i = 0; i < sFieldVal.length; i++) {
            
            var ch = sFieldVal.charAt(i);
 
            var c = ch.charCodeAt(0);
            
            if(c < 0 || c > 255) {
            
          alert("Please type english only");
          field.value="";
          return false;
                // Discard
            }
            else {
                sNewVal += ch;
            }
        }
        
        field.value = sNewVal;
    }