function show_hide(tab_form){
var tabForm = document.getElementById(tab_form);
if (tabForm.className == 'hide') tabForm.className = 'show';
else tabForm.className = 'hide';
}

function tabSwitch(tab){
	var length = 3; //no of tabs
	for (i=1;i<=length;i++){
		document.getElementById(i).className = "type type_"+i+" ";
		document.getElementById('tab_'+i).style.display = "none";
	}
	document.getElementById(tab).className="type type_"+tab+" act";
	document.getElementById('tab_'+tab).style.display ="block";
}