try this: http://jsfiddle.net/mig1098/ex6efsce/
var d = document.getElementById('schedule');
var chil = d.children[0];
var data = prompt('your data');
chil.setAttribute('href','/schedule?sku='+data);
alert(chil);
var url = chil.getAttribute('href');
var m = url.replace(/\/schedule\?sku\=/,'');
var r = document.getElementById('resp');
r.value = m;
1
solved Edit a link with javascript prototype [closed]