<script>

$(function() {

function trimChar(string, charToRemove) {
while(string.charAt(0)==charToRemove) {
string = string.substring(1);
}

while(string.charAt(string.length-1)==charToRemove) {
string = string.substring(0,string.length-1);
}

return string;
}

function updateURL() {
var addr = "/resources/profil.pdf?focus=";

var topics = ["graphics","games","marketing","multimedia","algotrading","performance","usability","network","unity"];

$.each(topics, function( index, topic ) {
if($("#"+topic+"-primary").is(":checked")) {
addr += topic+",";
}
});

$.each(topics, function( index, topic ) {
if($("#"+topic+"-yes").is(":checked")) {
addr += topic+",";
}
});

if($("#appendix-no").is(":checked")) {
addr += "noappendix,";
}

addr = trimChar(addr, ",");

var addrTxt = addr.replace(".pdf", ".txt");

$("a#link3").attr("href", addr);
$("a#link3").html("http://www.adrastea.com" + addr);

$("a#link4").attr("href", addrTxt);
$("a#link4").html("http://www.adrastea.com" + addrTxt);
}

$("input[type=radio]").click(function() {
updateURL();
});

updateURL();

});

</script>