function trim(str) {    
    return str.replace(/^\s+|\s+$/g, '') ;
}

function goToTop() {    
    window.scrollTo(0,0);
}

function openWindow(url)
{
    window.open (url, "mywindow"); 
}

function toggleDisplay(id) {
    var input = document.getElementById(id);
    if(input.style.display != 'block')
        input.style.display='block';
    else
        input.style.display='none';
}