function tabSwitch(tabID){
	if(tabID==1){
		document.getElementById('tab_1').style.display='block';
		document.getElementById('tab_1').style.visibility='visible';
		document.getElementById('tab_2').style.display='none';
		document.getElementById('tab_2').style.visibility='hidden';
	} else if(tabID==2){
		document.getElementById('tab_1').style.display='none';
		document.getElementById('tab_1').style.visibility='hidden';
		document.getElementById('tab_2').style.display='block';
		document.getElementById('tab_2').style.visibility='visible';
	}
}