function SetPage(value) {
	SetQueryString('page', value);
}

function SetLetter(value) {
	SetQueryString('letter', value);
}


function SetQueryString(argname, value) {
	var url = window.location.href.toString();
	var query = window.location.search.substring(1);
	var rExp = new RegExp(argname + "=[a-zA-Z0-9]+");
	url = url.substring(0, url.indexOf('?'));
	if (query.search(rExp) != -1)
		query = query.replace(rExp, argname + '=' + value);
	else
		query += ((query.length > 0) ? '&' : '') + argname + '=' + value;
	window.location.href = (url +'?'+ query);
}

function Guidelines(){	
	var newwin = window.open('/guidelines.html', 'Guidelines', 'width=300px, height=250px');
}