ld_var = function()
{
	var_intro = document.getElementById("intro");
	var_spec = document.getElementById("spec");
}

function intro()
{
	ld_var();
	var_intro.style.visibility = "visible";
	var_intro.style.position = "static";
	var_intro.style.width = "";
	var_spec.style.visibility = "hidden";
	var_spec.style.position = "absolute";
	var_spec.style.width = "50%";
}


function spec()
{
	ld_var();
	var_intro.style.visibility = "hidden";
	var_intro.style.position = "absolute";
	var_intro.style.width = "50%";
	var_spec.style.visibility = "visible";
	var_spec.style.position = "static";
	var_spec.style.width = "";
}