/* ----- ec_table_sorter.js ----- */

function initalizeECTableSort(e) {
    // terminate if we hit a non-compliant DOM implementation
    if (!W3CDOM){return false};

    var tbls = document.getElementsByTagName('table');
    
    for (var t = 0; t < tbls.length; t++)
        {
        // elements of class="synthetic" can be sorted
        var re = new RegExp(/\bsynthetic\b/)
        // elements of class="nosort" should not be sorted
        var xre = new RegExp(/\bnosort\b/)
        
        if (re.exec(tbls[t].className) && !xre.exec(tbls[t].className))
        {
            
            try {
               var thead = tbls[t].getElementsByTagName("thead").item(0);
                var node;
                // set up blank spaceholder gifs
                blankarrow = document.createElement('img');
                blankarrow.setAttribute('src', portal_url + '/arrowBlank.gif');
                blankarrow.setAttribute('height',6);
                blankarrow.setAttribute('width',9);
                // the first sortable column should get an arrow initially.
                initialsort = false;
                for (var i = 0; (node = thead.getElementsByTagName("th").item(i)); i++) {
                    // check that the columns does not have class="nosort"
                    if (!xre.exec(node.className)) {
                        node.insertBefore(blankarrow.cloneNode(1), node.firstChild);
                        node.style.cursor = 'pointer';
                        if (!initialsort) {
                            initialsort = true;
                            uparrow = document.createElement('img');
                            uparrow.setAttribute('src', portal_url + '/arrowUp.gif');
                            uparrow.setAttribute('height',6);
                            uparrow.setAttribute('width',9);
                            node.appendChild(uparrow);
                        } else {
                            node.appendChild(blankarrow.cloneNode(1));
                        }
    
                        if (node.addEventListener) node.addEventListener("click",sort,false);
                        else if (node.attachEvent) node.attachEvent("onclick",sort);
                    }
                }
            } catch(er) {}
        }
    }
}   
// **** End table sort script ***
registerPloneFunction(initalizeECTableSort)