// $Id$

var query_string = new Object();
    
window.location.search.replace(
  new RegExp( "([^?=&]+)(=([^&]*))?", "g" ),
  function( $0, $1, $2, $3 ){
    query_string[ $1 ] = $3;
  }
);

function onlyDisplay(filteryear) {
    alldivs = window.document.getElementsByTagName("div");
    var i;
    for (i=0; i < alldivs.length; i++) {
        x = alldivs[i];
	year = x.getAttributeNode("year");
	if (year && year.value == filteryear) {
            x.style.display = "block";
        } else if (year) {
            x.style.display = "none";
        }
    }
}

if (query_string["year"]) {
   onlyDisplay(query_string["year"]);
}