function showContentTab(tabname){
    var tabs = ["videos", "photos", "blog", "details", "speaker", "tickets"];
    for(var i in tabs){
        var _class = "";
        var _display = "none";
        if(tabs[i] == tabname){
            _display = "block";
            _class = "active";
        }
        if(document.getElementById('tab-content-'+tabs[i]))
        document.getElementById('tab-content-'+tabs[i]).style.display = _display;
        if(document.getElementById('nav-tab-'+tabs[i]))
        document.getElementById('nav-tab-'+tabs[i]).className = _class;
    }
}
function openAddress(e){
    var _address = e.innerHTML.replace(/(<([^>]+)>)/ig," "); // strip html 
    window.open('http://maps.google.com/maps?q='+_address);
}

//checks form field for default value and remove it
function checkText(obj,txt) {
   if (obj.value == txt) {
      obj.value = "";
   }
}
//checks form field for "" else add back default value
function checkDefault(obj,txt) {
   if (obj.value == "") {
      obj.value = txt;
   }
}