function show_tab(show_id)
{

	switch(show_id)
	 {
		case "HJJ":
			document.getElementById("HJJ").style.display="block";
			change_class("HJJ_href","f12bredlink");			
			break;
		case "GP":
			document.getElementById("GP").style.display="block";
			change_class("GP_href","f12bredlink");
			break;
		default:
			break;
	}

}

function hide_tab(hide_id)
{
	switch(hide_id)
	 {
		case "HJJ":
			document.getElementById("HJJ").style.display="none";
			change_class("HJJ_href","f12bluelink");
			break;
		case "GP":
			document.getElementById("GP").style.display="none";
			change_class("GP_href","f12bluelink");
			break;
		default:
			break;
	}
}
function change_class(id_name,class_name)
{
	try
	{
		document.getElementById(id_name).setAttribute("class", class_name);  //for firefox
		document.getElementById(id_name).setAttribute("className", class_name);  //for IE
	}
	catch(e)
	{
	}
}