function goto_spec1()
{
	document.getElementById('spec_title').className = "spec_title1";
	document.getElementById('spec_title1').className = "spec_title";
	document.getElementById('spec_title2').className = "spec_title1";
	document.getElementById('spec').style.display = "none";
	document.getElementById('spec1').style.display = "block";
	document.getElementById('spec2').style.display = "none";
}
function goto_spec()
{
	document.getElementById('spec_title').className = "spec_title";
	document.getElementById('spec_title1').className = "spec_title1";
	document.getElementById('spec_title2').className = "spec_title1";
	document.getElementById('spec').style.display = "block";
	document.getElementById('spec1').style.display = "none";
	document.getElementById('spec2').style.display = "none";
}
function goto_spec2()
{
	document.getElementById('spec_title').className = "spec_title1";
	document.getElementById('spec_title1').className = "spec_title1";
	document.getElementById('spec_title2').className = "spec_title";
	document.getElementById('spec').style.display = "none";
	document.getElementById('spec1').style.display = "none";
	document.getElementById('spec2').style.display = "block";
}