function show1(aa,bb,cc){
        document.all.div1.style.display="none";
        document.all.div2.style.display="none";
		document.all.div3.style.display="none";
		document.all.div4.style.display="none";

		document.all.nav1.style.display="none";
		document.all.nav2.style.display="none";		
		document.all.nav3.style.display="none";
		document.all.nav4.style.display="none";

		document.all.text1.style.display="block";		
		document.all.text2.style.display="block";
		document.all.text3.style.display="block";
		document.all.text4.style.display="block";

		aa.style.display="block";
		bb.style.display="block";
		cc.style.display="none";

	}
//document.write('<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7"/>');