function changeField(formName, name)
{

        var form = document.forms[formName], i = 0;
        for(i=0; i < form.length;i++){
                if(form[i].type == 'text' && form[i] == name){
                        form[i].disabled = !form[i].disabled;
                }
        }
}

function checkAll(formName, arrayName) {
        var form = document.forms[formName], i = 0;
        for(i=0; i < form.length;i++){
                if(form[i].type == 'checkbox' && form[i].name == arrayName){
                        form[i].checked = 'checked';
                }
        }
}

function uncheckAll(formName, arrayName) {
        var form = document.forms[formName], i = 0;
        for(i=0; i < form.length;i++){
                if(form[i].type == 'checkbox' && form[i].name == arrayName){
                        form[i].checked = false;
                }
        }
}

function selector(checkall) {
        var form = document.forms['list'], i = 0;
        for(i=0; i < form.length;i++){
                if(form[i].type == 'checkbox' && form[i].name != 'checkall'){
                        form[i].checked = checkall.checked;
                }
        }
}

function getDiv(id)
{
        var elem;
        if (document.getElementById) 
                elem = document.getElementById(id);
        else if (document.all) 
                elem = document.all[id];
        else if (document.layers) 
                elem = document.layers[id];

        return elem;
}


function changeLoginForm(type)
{

        site = getDiv('sitelogin');
        google = getDiv('googlelogin');
        grono = getDiv('gronologin');

        site.style.display = 'none';
        google.style.display = 'none';
        grono.style.display = 'none';

        if (type == 'site') {
                site.style.display = 'block';
        } else if (type == 'google'){
                google.style.display = 'block';
        } else if (type == 'grono'){
                grono.style.display = 'block';
        }
}


function showPopup(id, w,h)
{
        var baseText = null;
        popUp = getDiv(id);
        popUp.style.top = "80px";
        popUp.style.right = "20%";
        popUp.style.width = w + "px";
        popUp.style.height = h + "px";

        if (baseText == null) baseText = popUp.innerHTML;
        popUp.innerHTML = baseText;
        popUp.style.visibility = "visible";
}

function hidePopup(id)
{
        popUp = getDiv(id);
        popUp.style.visibility = "hidden";
}