Event.observe(window, 'load', function() {
    Event.observe('tabHeader1', 'click', function(){
        toggleTab(1,4);
    });
    Event.observe('tabHeader2', 'click', function(){
        toggleTab(2,4);
    });
    Event.observe('tabHeader3', 'click', function(){
        toggleTab(3,4);
    });
    Event.observe('tabHeader4', 'click', function(){
        toggleTab(4,4);
    });
});
document.observe("dom:loaded", function() {
		$('tabContent1').setStyle('display: none;');
		$('tabContent2').setStyle('display: none;');
		$('tabContent3').setStyle('display: none;');
		$('tabContent4').setStyle('display: none;');
})