Code:
var copying = false;
function copy(formNum, fromName, toName, prefix) {
if(!copying) return;
var from = document.forms[formNum].elements[fromName],
to = document.forms[formNum].elements[toName];
to.value = (prefix ? prefix : "") + from.value;
window.setTimeout("copy('" + formNum + "', '" + fromName + "', '" + toName + "'" + (prefix ? ", '" + prefix + "'" : "") + ")", 300);
}
function beginCopy(formNum, fromName, toName, prefix) {
copying = true;
copy(formNum, fromName, toName, prefix);
}
function endCopy() {
copying = false;
}
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