/* example:

 * var params = parseParams();

 *

 * This will return an array of name=value pairs which

 * can be manipulated as desired

 */



function parseParams()

{

    var index = 0;

    var x;

    var url = this.window.location.toString();

    var params = new Array();

    var start = url.indexOf("?");



    if (start<0) {

        return false;

    }



    for (var i = ++start; i < url.length; i++) {

        if (!params[index])

            params[index] = "";

        var x = url.charAt(i);

        if (x != '&')

            params[index] += x;

        else

            index++;

    }

    return unescapeUrl(params);

}



/* Example:

 * var data = getParam(params, "d_name")

 *

 * get a parameter by token name from an array of params

 *

 */



function getParam(params, token)

{

	var pre;

	var eq;

	for (var i = 0; i < params.length; i++) {

		eq = params[i].search("=");

		if (eq != -1) {

			pre = params[i].substr(0,eq);

			if (token == pre) {

				return params[i].substr(eq+1, params[i].length);

			}

		}

	}

	return "";

}



/* 

 * Supporting Functions. Dont' call these directly.

 */



/* used to escape an array of url encoded strings */

function unescapeUrl(p_arr)

{

	for (var i = 0; i < p_arr.length; i++) {

		p_arr[i] = unescapeUrl2(p_arr[i]);

	}

	return p_arr;

}



/* used to escape a url encoded string */

function unescapeUrl2(strToEscape)

{

	var length_s = strToEscape.length;

	var strToReturn = new String();

	var char_c;

	for (var i = 0; i < length_s; i++) {

		char_c = strToEscape.charAt(i);

		if (char_c == "+") {

			char_c = " ";

		}

		if (char_c == "%") {

			var tmp_str = strToEscape.substr(i,3);

			char_c = unescape(tmp_str);

			i += 2;

		}

		strToReturn += char_c;

	}

	return strToReturn;

}