function srch(val){
var v = val;
var d = 'id' + v;
var a = d + 1;
document.getElementById('id1').style.display="none";
document.getElementById('id2').style.display="none";
document.getElementById('id3').style.display="none";
document.getElementById('id4').style.display="none";
document.getElementById(d).style.display="block";
document.getElementById('id11').className="none";
document.getElementById('id21').className="none ";
document.getElementById('id31').className="none ";
document.getElementById('id41').className="none";
document.getElementById(a).className="selected";
}