// JavaScript Document
function jiaohu(i){
		switch(i){
			case 1:
			document.getElementById("layer01").style.display="block";
			document.getElementById("layer02").style.display="none";
			document.getElementById("layer03").style.display="none";
			document.getElementById("layer04").style.display="none";
			document.getElementById("bg01").className="tit_over";
			document.getElementById("bg02").className="tit_out";
			document.getElementById("bg03").className="tit_out";
			document.getElementById("bg04").className="tit_out";
			break;
			case 2:
			document.getElementById("layer01").style.display="none";
			document.getElementById("layer02").style.display="block";
			document.getElementById("layer03").style.display="none";
			document.getElementById("layer04").style.display="none";
			document.getElementById("bg01").className="tit_out";
			document.getElementById("bg02").className="tit_over";
			document.getElementById("bg03").className="tit_out";
			document.getElementById("bg04").className="tit_out";
			break;
			case 3:
			document.getElementById("layer01").style.display="none";
			document.getElementById("layer02").style.display="none";
			document.getElementById("layer03").style.display="block";
			document.getElementById("layer04").style.display="none";
			document.getElementById("bg01").className="tit_out";
			document.getElementById("bg02").className="tit_out";
			document.getElementById("bg03").className="tit_over";
			document.getElementById("bg04").className="tit_out";
			break;
			case 4:
			document.getElementById("layer01").style.display="none";
			document.getElementById("layer02").style.display="none";
			document.getElementById("layer03").style.display="none";
			document.getElementById("layer04").style.display="block";
			document.getElementById("bg01").className="tit_out";
			document.getElementById("bg02").className="tit_out";
			document.getElementById("bg03").className="tit_out";
			document.getElementById("bg04").className="tit_over";
			break;


		}
	}