function showtr(dongxi)
{
	if (dongxi == "1")
	{
	document.getElementById("kk1").style.display="";
	document.getElementById("kk2").style.display="none";
	document.getElementById("kk3").style.display="none";
	document.getElementById("kk4").style.display="none";
	document.getElementById("sk1").className="jobs_over";
	document.getElementById("sk2").className="jobs_link";
	document.getElementById("sk3").className="jobs_link";
	document.getElementById("sk4").className="jobs_link";
}
	
	if (dongxi == "2")
	{
	document.getElementById("kk1").style.display="none";
	document.getElementById("kk2").style.display="";
	document.getElementById("kk3").style.display="none";
	document.getElementById("kk4").style.display="none";
	
	document.getElementById("sk1").className="jobs_link";
	document.getElementById("sk2").className="jobs_over";
	document.getElementById("sk3").className="jobs_link";
	document.getElementById("sk4").className="jobs_link";
}

	if (dongxi == "3")
	{
	document.getElementById("kk1").style.display="none";
	document.getElementById("kk2").style.display="none";
	document.getElementById("kk3").style.display="";
	document.getElementById("kk4").style.display="none";
	
	document.getElementById("sk1").className="jobs_link";
	document.getElementById("sk2").className="jobs_link";
	document.getElementById("sk3").className="jobs_over";
	document.getElementById("sk4").className="jobs_link";
}

	if (dongxi == "4")
	{
	document.getElementById("kk1").style.display="none";
	document.getElementById("kk2").style.display="none";
	document.getElementById("kk3").style.display="none";
	document.getElementById("kk4").style.display="";
	
	document.getElementById("sk1").className="jobs_link";
	document.getElementById("sk2").className="jobs_link";
	document.getElementById("sk3").className="jobs_link";
	document.getElementById("sk4").className="jobs_over";
}
}