function mainSearchCheck() 
    {
        // Removes spaces after keywords
        while(''+document.mainSearch.look_for.value.charAt(document.mainSearch.look_for.value.length-1)==' ')document.mainSearch.look_for.value=document.mainSearch.look_for.value.substring(0,document.mainSearch.look_for.value.length-1);

        if (document.mainSearch.look_for.value == "") 
        {
        alert("You must enter a search term.");
        document.mainSearch.look_for.focus();
        return false;
        }
    }

  function fSearchCheck() 
    {
        // Removes spaces after keywords
        while(''+document.fSearch.look_for.value.charAt(document.fSearch.look_for.value.length-1)==' ')document.fSearch.look_for.value=document.fSearch.look_for.value.substring(0,document.fSearch.look_for.value.length-1);

        if (document.fSearch.look_for.value == "") 
        {
        alert("You must enter a keyword.");
        document.fSearch.look_for.focus();
        return false;
        }
    }

  function fBrowseCheck() 
    {
        if (document.fBrowse.Cat.value == "") 
        {
        alert("You must choose a category.");
        document.fBrowse.Cat.focus();
        return false;
        }
    }