Here is a nice javascript snippet which allows you to read querystring parameter values. Actually i used this code in a SharePoint application page to read ListId and ItemId values that i was passing from previous page.
// ************************************************************
// Create an array to keep query string variables
var qsParm = new Array();
// This function gets query string values from current page
// and stores them in above defined array
function qs()
{
var query = window.location.search.substring(1);
var parms = query.split(‘&’);
for (var i=0; i<parms.length; i++) {
var pos = parms[i].indexOf(‘=’);
if (pos > 0)
{
var key = parms[i].substring(0,pos);
var val = parms[i].substring(pos+1);
qsParm[key] = val;
}
}
}
qsParm['ListId'] = null;
qsParm['ItemId'] = null;
// Call function – get query strings
qs();
// For example show ListId
alert(qsParm['ListId'])
// ************************************************************
zieglers
