function show_tab(tab_id){
	if(document.getElementById('tabs')){
		
		if(tab_id == "tab1") {		
			document.getElementById('tabs').style.background='url("http://www.wintertainer.com/es/img/bg_tabs.gif") no-repeat -506px 0';
		}
		if(tab_id == "tab2") {		
			document.getElementById('tabs').style.background='url("http://www.wintertainer.com/es/img/bg_tabs.gif") no-repeat -1012px 0';
		}
		if(tab_id == "tab3") {		
			document.getElementById('tabs').style.background='url("http://www.wintertainer.com/es/img/bg_tabs.gif") no-repeat -1518px 0';
		}
	}
}

function show_default_tab(){
	if(currentTab != undefined){		
			document.getElementById('tabs').style.background='url("http://www.wintertainer.com/es/img/bg_tabs.gif") no-repeat 0 0';
			if(currentTab == "tab0") {		
					document.getElementById('tabs').style.background='url("http://www.wintertainer.com/es/img/bg_tabs.gif") no-repeat 0 0';
			}
			if(currentTab == "tab1") {		
					document.getElementById('tabs').style.background='url("http://www.wintertainer.com/es/img/bg_tabs.gif") no-repeat -506px 0';
			}
			if(currentTab == "tab2") {		
				document.getElementById('tabs').style.background='url("http://www.wintertainer.com/es/img/bg_tabs.gif") no-repeat -1012px 0';
			}
			if(currentTab == "tab3") {		
				document.getElementById('tabs').style.background='url("http://www.wintertainer.com/es/img/bg_tabs.gif") no-repeat -1518px 0';
			}		
	}
}