var ids = new Array('tabOneContent','tabTwoContent','tabThreeContent','tabFourContent' );
        var tabs = new Array('welcome','phones','plans','accessories' );
        
        function switchid (id,tabs) {
            hideallids();
            hideallactive();
            showdiv(id);
            showActive(tabs);
            }
        
        function hideallids () {
                for (var i=0; i<ids.length;i++) {
                    hidediv(ids[i]);
                }
            }
        function hidediv(id) {
            if (document.getElementById) {
                document.getElementById(id).style.display = 'none';
            }
        }
        function showdiv(id) {
            if (document.getElementById) {
                document.getElementById(id).style.display = 'block';
            }
        }
        function hideallactive () {
                for (var i=0; i<tabs.length;i++) {
                    showInactive(tabs[i]);
                }
            }
        function showActive (tabs) {
            if (document.getElementById) {
                document.getElementById(tabs).className = 'active';
        }
        }
        function showInactive (tabs) {
            if (document.getElementById) {
                document.getElementById(tabs).className = ' ';
        }
        }