function goBack() {
    window.history.go(-1);
}

function focusInput(objID, str) {
    var obj = document.getElementById(objID);
    if (obj.value == str) {
        obj.value = '';
    }
    obj.style.color = "#333333";
}

function blurInput(objID, str) {
    var obj = document.getElementById(objID);
    if (obj.value == '') {
        obj.value = str;
        obj.style.color = "#999999";
    }
    else {
        obj.style.color = "#333333";
    }
}

function checkInputs(authorID, authorStr, emailID, emailStr, websiteID, websiteStr, commentID, commentStr) {
    var author = document.getElementById(authorID);
    var email = document.getElementById(emailID);
    var website = document.getElementById(websiteID);
    var commentarea = document.getElementById(commentID);
    if (author.value == authorStr) {
        author.value = "";
    }
    if (email.value == emailStr) {
        email.value = "";        
    }
    if (website.value == websiteStr) {
        website.value = "";
    }
    if (commentarea.value == commentStr) {
        commentarea.value = "";
    }
}