function admintab(new_tab, new_content) {	
	document.getElementById('tab_1').style.display = 'none';
	document.getElementById('tab_2').style.display = 'none';
	document.getElementById('tab_3').style.display = 'none';
	if(document.getElementById('tab_4')){
	document.getElementById('tab_4').style.display = 'none';	
	}
	if(document.getElementById('tab_5')){
	document.getElementById('tab_5').style.display = 'none';	
	}
	document.getElementById(new_content).style.display = 'block';	
	document.getElementById('admin_tab1').className = '';
	document.getElementById('admin_tab2').className = '';
	document.getElementById('admin_tab3').className = '';		
	if(document.getElementById('admin_tab4')){
	document.getElementById('admin_tab4').className = '';		
	}
	if(document.getElementById('admin_tab5')){
	document.getElementById('admin_tab5').className = '';		
	}
	document.getElementById(new_tab).className = 'active';		
}