java.net.URLEncoder.encode(some_URL, "UTF-8")

/** 
* Return a URL-encoded string version of the argument passed in. 
*/ 
function urlEncode(arg)
{
	try {
		return java.net.URLEncoder.encode(arg,"UTF-8");
	} catch (err) {
		// Fall-through
	} 
	// If UTF-8 failed, just use the default encoding. 
	return java.net.URLEncoder.encode(arg);
}