/*
 * jeopardy.js
 *
 * Computer Science 50, Fall 2011
 * section10
 *
 * Loads the jeopardy board and more!
 */

// give arrays a lookup property
Array.prototype.lookup = function(v)
{
    for (var i = 0; i < this.length; i++)
        if (this[i] === v)
            return true;
    return false;
}

// initalize an array to keep trak of squares that have been chosen
var chosen = new Array();

/*
 * void
 * load_board()
 *
 * Loads the board.
 */

function load_board()
{
    var html = "<col width=200><col width=200><col width=200><col width=200><col width=200><tr>";
                
    var c1 = "<td>I C You Harvard</td>";
    var c2 = "<td>WWWinning</td>";
    var c3 = "<td>pset9</td>";
    var c4 = "<td>FUNctions</td>";
    var c5 = "<td>rand()</td>";
                
    html += c1 + c2 + c3 + c4 + c5 + "</tr>";
                
    for (var i = 1; i <= 5; i++)
    {
        html += "<tr>";
        for (var j = 1; j <= 5; j++)
        {
            html += "<td>";
            
            // if the square has already been chosen, don't print it out as a button
            if (chosen.lookup(j + (i * 100)))
                html += i + "00";
            else
                html += "<input onclick='choose(" + j + "," + i + "00);' type='button' value='" + i + "00'></td>";
            
            html += "</td>";
        }            
        html += "</tr>";
    }
                
    document.getElementById("board").innerHTML = html;
}

/*
 * void
 * choose(category, value)
 *
 * Opens the chosen square in a new window.
 */

function choose(category, value)
{
    // add square to chosen array
    chosen.push(category + value);
    
    // open the chosen square in a new window
    var root = "http://192.168.56.50/~jharvard/section10/jeopardy/";
    var page = "square.php?";
    window.open(root + page + "category=" + category + "&value=" + value);

    // reload the board
    load_board();
}