function checkSearch(form)
{
    var keywords = form.keyword.value;
    //trim out the whitespace
    keywords = trim(keywords);
    
    if (keywords.length == 0) 
    {
        alert("Please enter at least one search item.");
        form.keyword.focus();
        form.keyword.value = "";
        form.keyword.select();
        return false;
    }
    
    // Be sure field only has valid characters
    if (!string_charset_check(keywords, CS_TEXTSEARCH, ""))
    {
        alert("We do not understand that search term.  Please try using a product name, manufacturer, or general grocery category.");
        form.keyword.focus();
        form.keyword.value = "";
        form.keyword.select();
        return false;
    }

    //If past checks, return true;
    return true;
}