function setNavClasses(on,off1,off2,off3,off4,off5, off6) {
	document.getElementById("tabLink" + on).className = "tabLink" + on + "Selected";
	document.getElementById("tabLink" + off1).className = "";
	document.getElementById("tabLink" + off2).className = "";
	document.getElementById("tabLink" + off3).className = "";
	document.getElementById("tabLink" + off4).className = "";
	document.getElementById("tabLink" + off5).className = "";
	document.getElementById("tabLink" + off6).className = "";	
	if (on == '1') {
	 document.getElementById('content1').style.display = 'block';
	 document.getElementById('content2').style.display = 'none';
	 document.getElementById('content3').style.display = 'none';
	 document.getElementById('content4').style.display = 'none';
	 document.getElementById('content5').style.display = 'none';
	 document.getElementById('content6').style.display = 'none';	 
	 document.getElementById('content7').style.display = 'none';	 
	}
	if (on == '2') {
	 document.getElementById('content2').style.display = 'block';
	 document.getElementById('content1').style.display = 'none';
	 document.getElementById('content3').style.display = 'none';
	 document.getElementById('content4').style.display = 'none';
	 document.getElementById('content5').style.display = 'none';
	 document.getElementById('content6').style.display = 'none';	 
	 document.getElementById('content7').style.display = 'none';	
	}
	if (on == '3') {
	 document.getElementById('content3').style.display = 'block';
	 document.getElementById('content2').style.display = 'none';
	 document.getElementById('content1').style.display = 'none';
	 document.getElementById('content4').style.display = 'none';
	 document.getElementById('content5').style.display = 'none';
	 document.getElementById('content6').style.display = 'none';	 
	 document.getElementById('content7').style.display = 'none';	
	}
	if (on == '4') {
	 document.getElementById('content4').style.display = 'block';
	 document.getElementById('content1').style.display = 'none';
	 document.getElementById('content3').style.display = 'none';
	 document.getElementById('content2').style.display = 'none';
	 document.getElementById('content5').style.display = 'none';
	 document.getElementById('content6').style.display = 'none';	 
	 document.getElementById('content7').style.display = 'none';	
	}
	if (on == '5') {
	 document.getElementById('content5').style.display = 'block';
	 document.getElementById('content1').style.display = 'none';
	 document.getElementById('content3').style.display = 'none';
	 document.getElementById('content4').style.display = 'none';
	 document.getElementById('content2').style.display = 'none';
	 document.getElementById('content6').style.display = 'none';	 
	 document.getElementById('content7').style.display = 'none';	
	}
	if (on == '6') {
	 document.getElementById('content6').style.display = 'block';
	 document.getElementById('content1').style.display = 'none';
	 document.getElementById('content3').style.display = 'none';
	 document.getElementById('content4').style.display = 'none';
	 document.getElementById('content5').style.display = 'none';
	 document.getElementById('content2').style.display = 'none';	 
	 document.getElementById('content7').style.display = 'none';	
	}	
	if (on == '7') {
	 document.getElementById('content7').style.display = 'block';
	 document.getElementById('content1').style.display = 'none';
	 document.getElementById('content3').style.display = 'none';
	 document.getElementById('content4').style.display = 'none';
	 document.getElementById('content5').style.display = 'none';
	 document.getElementById('content2').style.display = 'none';	 
	 document.getElementById('content6').style.display = 'none';	
	}	
   }
   
   function tab1() {
    setNavClasses(1,2,3,4,5,6,7); return false;
   }
   function tab2() {
    setNavClasses(2,1,3,4,5,6,7); return false;
   }
   function tab3() {
    setNavClasses(3,1,2,4,5,6,7); return false;
   }
   function tab4() {
    setNavClasses(4,1,2,3,5,6,7); return false;
   }   
   function tab5() {
    setNavClasses(5,1,2,3,4,6,7); return false;
   }      
   function tab6() {
    setNavClasses(6,1,2,3,4,5,7); return false;
   }        
   function tab7() {
    setNavClasses(7,6,1,2,3,4,5); return false;
   }