function Trim(str) {
    var resultStr="";resultStr=TrimLeft(str);resultStr=TrimRight(resultStr);return resultStr;
}

function TrimLeft(str) {
    var resultStr="";
    var i=len=0;
    if (str+""=="undefined" || str==null)	
        return null;
    str += "";
    if (str.length == 0) 
	resultStr = "";
    else {	
    // Loop through string starting at the beginning as long as there are spaces.
	len = str.length;	
  	while ((i <= len) && (str.charAt(i) == " "))
            i++;
   	// When the loop is done, we're sitting at the first non-space char,
 	// so return that char plus the remaining chars of the string.
  	resultStr = str.substring(i, len);
  	}
    return resultStr;
}

function TrimRight(str) {
    var resultStr = "";
    var i = 0;
    // Return immediately if an invalid value was passed in
    if (str+"" == "undefined" || str == null)
        return null;
    // Make sure the argument is a string
    str += "";

    if (str.length == 0)
        resultStr = "";
    else {
        // Loop through string starting at the end as long as there
        // are spaces.
        i = str.length - 1;
        while ((i >= 0) && (str.charAt(i) == " "))
            i--;

        // When the loop is done, we're sitting at the last non-space char,
        // so return that char plus all previous chars of the string.
        resultStr = str.substring(0, i + 1);
    }

    return resultStr;
}

querystring.keys = new Array();
querystring.values = new Array();
querystring_Parse();

function querystring(key){
    var value = null;
    for (var i=0;i<querystring.keys.length;i++) {
        if (querystring.keys[i]==key) {
            value = querystring.values[i];
            break;
        }
    }
    return value;
}
    
function querystring_Parse() {
    var query = window.location.search.substring(1);
    var pairs = query.split("&");
    for (var i=0;i<pairs.length;i++){
        var pos = pairs[i].indexOf('=');
        if (pos >= 0) {
            var argname = pairs[i].substring(0,pos);
            var value = pairs[i].substring(pos+1);
            querystring.keys[querystring.keys.length] = argname;
            querystring.values[querystring.values.length] = value;
        }
    }
}