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14.02.urlArgs.js
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14.02.urlArgs.js
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/*
* This function parses ampersand-separated name=value argument pairs from
* the query string of the URL. It stores the name=value pairs in
* properties of an object and returns that object. Use it like this:
*
* var args = urlArgs(); // Parse args from URL
* var q = args.q || ""; // Use argument, if defined, or a default value
* var n = args.n ? parseInt(args.n) : 10;
*/
function urlArgs() {
var args = {}; // Start with an empty object
var query = location.search.substring(1); // Get query string, minus '?'
var pairs = query.split("&"); // Split at ampersands
for(var i = 0; i < pairs.length; i++) { // For each fragment
var pos = pairs[i].indexOf('='); // Look for "name=value"
if (pos == -1) continue; // If not found, skip it
var name = pairs[i].substring(0,pos); // Extract the name
var value = pairs[i].substring(pos+1); // Extract the value
value = decodeURIComponent(value); // Decode the value
args[name] = value; // Store as a property
}
return args; // Return the parsed arguments
}