window.onload=function()
{

var sp_tab= document.getElementById("sp_list");
var dsp_tab= document.getElementById("dsp_list");
document.getElementById("dsp").style.display="none";
sp_tab.className="tab left on";
sp_tab.onclick=function()
	{hideboth();
	this.className="tab left on";
	document.getElementById("sp").style.display="block";
	}
		dsp_tab.onclick=function()
	{
	hideboth();
	this.className="tab left on";
	document.getElementById("dsp").style.display="block";
	}
}
function hideboth()
{
document.getElementById("sp_list").className="tab left";
document.getElementById("dsp_list").className="tab left";
document.getElementById("sp").style.display="none";
document.getElementById("dsp").style.display="none";
}