function getChart(url){
        Ajax.getInclude(url, function(data) {
            dwr.util.setValue("forward", data, { escapeHtml:false });
            hideLoadingImage();
            displayButton();
        })
    }
    
    function getTable(url){
        hideButton();
        Ajax.getInclude(url, function(data) {
            dwr.util.setValue("forward2", data, { escapeHtml:false });
            hideLoadingImage();
            displayTable();
        })
    }
    
    function hideChart() {
        $("forward").style.visibility = "hidden";
    }
    
    function displayChart() {
        $("forward").style.visibility = "visible";
    }
    
    function hideTable() {
        $("forward2").style.visibility = "hidden";
    }
    
    function displayTable() {
        $("forward2").style.visibility = "visible";
        displayButton();
    }
    
    function displayLoadingImage() {
        $("progress").style.visibility = "visible";
        hideButton();
    }
    
    function hideLoadingImage() {
        $("progress").style.visibility = "hidden";
        displayButton();
    }
    
    function hideButton() {
        $("button").style.visibility = "hidden";
    }
    
    function displayButton() {
        $("button").style.visibility = "visible";
    }
    
    function hideOverwrite() {
        $("overwrite").style.visibility = "hidden";
    }
    
    function displayOverwrite() {
        $("overwrite").style.visibility = "visible";
    }