I would use:
if (!String.prototype.toTitleCase) {
String.prototype.toTitleCase = function() {
return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();
}
}
And:
function getSearchTerms(link) {
link = link.substring(link.indexOf("=") + 1);
var arr = link.split("+");
for (var i = 0; i < arr.length; i++) {
arr[i] = arr[i].toTitleCase();
}
return arr.join(" ");
}