var k=0;
function changeimg(k) 
{ 
switch (k)
{ 
case 0 :
document.headI.src="./common_it/header/otrnaz.jpg";
document.getElementById('headL').style.visibility='visible';
break;
case 1:
document.headI.src="./common_it/header/otrint.jpg";
document.getElementById('headL').style.visibility='visible';
break;
case 2:
document.headI.src="./common_it/header/otruff.jpg";
document.getElementById('headL').style.visibility='visible';
break;
case 3:
document.headI.src="./common_it/header/oautotr.jpg";
document.getElementById('headL').style.visibility='visible';
break;
case 4:
document.headI.src="./common_it/header/osped.jpg";
document.getElementById('headL').style.visibility='visible';
break;
default :
document.headI.src="./common_it/header/otrnaz.jpg";
document.getElementById('headL').style.visibility='visible';
break;
}
}