// Allows the user to select a namespace to search in from the corner search bar

prefixString = 
"<option >Article:</option>\n <option>Article talk:</option>\n <option>Wikipedia:</option>\n <option>Wikipedia talk:</option>\n <option>User:</option>\n <option>User talk:</option>\n<option>WikiProject:</option>\n <option>WikiProject talk:</option>\n<option>Category:</option>\n <option>Category talk:</option>\n<option>Template:</option>\n <option>Template talk:</option>\n <option>Book:</option>\n <option>Book talk:</option>\n<option>Help:</option>\n <option>Special:</option>";

$(document).ready(function()
{
    //retrieve existing elements that we're going to use
    searchBar = document.getElementById("searchInput");
    searchButton = document.getElementById("searchButton");
    searchForm = document.getElementById("searchform");
    searchDiv = document.getElementById("simpleSearch");
    if ( !searchDiv || !searchBar ) return; // mobile skin.

    //create new elements that we're going to insert
    prefixList = document.createElement("select");
    hiddenInput = document.createElement("input");

    //initialize new elements
    prefixList.id = "prefixList";
    prefixList.innerHTML = prefixString;
    hiddenInput.id = "hiddenInput";
    hiddenInput.name = "search";
    hiddenInput.type = "hidden";

    //insert new elements
    searchBar.parentNode.insertBefore(hiddenInput, searchBar);
    searchDiv.parentNode.insertBefore(prefixList, searchDiv);

    //modify old ones
    searchForm.onsubmit = createSearchTerm;
    searchForm.style.marginTop = "0px";
    searchBar.removeAttribute("name"); //since we're no longer using the search bar to submit the search terms directly
    searchDiv.style.display = "inline-block";
    prefixList.style.marginTop = ".8em";
    prefixList.tabIndex = searchBar.tabIndex;
});

//onsubmit handler; concatenates prefixList and searchBar and inserts into hidden input prior to submission
function createSearchTerm(e)
{
    //retrieve used elements
    hiddenInput = document.getElementById("hiddenInput");
    prefixList = document.getElementById("prefixList");
    searchBar = document.getElementById("searchInput");
 
    //do the work (handling special cases)
    if(prefixList.value == "Article:")
    {
        hiddenInput.value = "" + searchBar.value;
    }
    else if(prefixList.value == "Article talk:")
    {
        hiddenInput.value = "" + "Talk:" + searchBar.value;
    }
    else if(prefixList.value == "WikiProject:")
    {
        hiddenInput.value = "" + "Wikipedia:WikiProject " + searchBar.value;
    }
    else if(prefixList.value == "WikiProject talk:")
    {
        hiddenInput.value = "" + "Wikipedia talk:WikiProject " + searchBar.value;
    }
    else
    {     
        hiddenInput.value = "" + prefixList.value + searchBar.value;
    }
}