function chglink(){

var c = document.form1.country.value;
var p = document.form1.postcode.value;
var d = document.form1.distance.value;

document.getElementById("resultlink").innerHTML="<a href='result2.asp?p=" + p + "&amp;c=" + c + "&amp;d=" + d + "&amp;keepThis=true&amp;TB_iframe=true&amp;height=300&amp;width=500' class='thickbox'><img src='images/search_it.jpg'></a>";
}