function showDiv(id){
    if( document.getElementById(id).style.display == "block" ) document.getElementById(id).style.display = "none";
    else document.getElementById(id).style.display = "block";
}

function swapNews(show, hide){
    document.getElementById(show).style.display = "block";
    document.getElementById(hide).style.display = "none";
}

function showTabs(tab){
    switch( tab ){
        case "description":
            document.getElementById("features").style.display = "none";
            document.getElementById("specifications").style.display = "none";
            document.getElementById("features_a").className = "";
            document.getElementById("specifications_a").className = "";
            break;
        case "features":
            document.getElementById("description").style.display = "none";
            document.getElementById("specifications").style.display = "none";
            document.getElementById("description_a").className = "";
            document.getElementById("specifications_a").className = "";
            break;
        case "specifications":
            document.getElementById("description").style.display = "none";
            document.getElementById("features").style.display = "none";
            document.getElementById("description_a").className = "";
            document.getElementById("features_a").className = "";
            break;
    }
    document.getElementById(tab + "_a").className = "active";
    document.getElementById(tab).style.display = "block";
}

function activateForm(){
        
        var code=escape(document.getElementById('txtCode').value);
        var name=escape(document.getElementById('txtName').value);
        var address=escape(document.getElementById('txtAddress').value);
        var email=escape(document.getElementById('txtEmail').value);
        
        var emailcheck = document.getElementById("txtEmail").value;
	    var mail_filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
    	if( mail_filter.test(emailcheck) ){
			if ( ajax("ajax/saveForm.php", "code="+code+"&name="+name+"&address="+address+"&email="+email) == "1") {
    	    	var activation = ajax("ajax/encodeForm.php", "code="+code+"&name="+name+"&address="+address+"&email="+email);
            	window.location.href="http://www.microsonicmusic.com/index.php?section=36&activate="+activation;
	        }
    	    else {
        	    alert("There was an error activating your voucher number.");
	        }
	    } else {
	    	alert("Invalid e-mail address.");
	    	return false;
	    }
}