// querystring
// Call function by x = querystring("variable") returns variable=x

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

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;
}
}
}
querystring_Parse();