function clearField(field_id, default_message ){
	if (document.getElementById(field_id).value == default_message) {
		document.getElementById(field_id).value = '';
	}
}

function change_article(id) {
    var d = document;
    var buttons = d.getElementById('homeFeaturesArticles').getElementsByTagName('a');
    for (i=1; i <= buttons.length; i++) {
        c = d.getElementById('article_btn_' + i);
        if (c.className == 'last-active') c.className = 'last';
        if (c.className != 'last') c.className = '';
        if(d.getElementById('article_' + i) != null)
        d.getElementById('article_' + i).style.display = 'none';
    }
    c2 = d.getElementById('article_btn_' + id);
    if (c2.className != 'last') {
        c2.className = 'active';
    } else {
        c2.className = 'last-active';
    }
    d.getElementById('article_' + id).style.display = 'block';
}

function change_tab(id) {
    var d = document;
    var element = null;
	for (i = 1; i <= 3; i++) {
	    element = d.getElementById('tab_btn_' + i);
	    if (element) {
	        element.className = '';
	    }
	    element = d.getElementById('tab_' + i);
	    if (element) {
		    element.style.display = 'none';
		}
	}
	element = d.getElementById('tab_btn_' + id);
	if (element) {
	    element.className = 'active';
	}
	element = d.getElementById('tab_' + id);
	if (element) {
	    element.style.display = 'block';
	}
}

function load_most_viewed() {
    new Ajax.Updater('tab_2', '/externalcalls/MostViewedArticles');
}

function change_rounduplinks(id) {
      var d = document;
      if (id == 1) {
        d.getElementById('tab_btn_1').className = 'tab active1';
        d.getElementById('tab_btn_2').className = 'tab';
        d.getElementById('MediaRoundupNews').style.display = 'block';
        d.getElementById('MediaRoundupCommentary').style.display = 'none';
      }
      if (id == 2) {
        d.getElementById('tab_btn_1').className = 'tab';
        d.getElementById('tab_btn_2').className = 'tab active2';
        d.getElementById('MediaRoundupNews').style.display = 'none';
        d.getElementById('MediaRoundupCommentary').style.display = 'block';
      }
}

function OpenConstantContact()
{
      var email = document.getElementById('TextBoxCC')
      window.open('http://ui.constantcontact.com/d.jsp?go=Go&m=1101336625753&p=oi&ea='+email.value);
      email.value='';
  }

function FreeTrialRequest(inputObj)
{
    $('wprSubscriptionTrial').innerHTML = '<img src="/images/spinner20.gif" alt="" style="display:block;margin:0 auto;" />';
    new Ajax.Updater('wprSubscriptionTrial', '/home/FreeSubscriptionRequest', {
        parameters: { email: inputObj.value }
    });
}