function rndBkg(fromClick) 
	{ 
	t = parseQuery("bg");
	newRnd = ( t && t<=allImages && !fromClick )   ?    t    :     rand(allImages)   ; 	
	document.getElementById("showBG").setAttribute("background","images/bg"+newRnd+".gif"); 
	document.getElementById("whichImageNumber").innerHTML = newRnd + " / " + allImages;
	}
rnd.today=new Date();
rnd.seed=rnd.today.getTime();
function rnd() { rnd.seed = (rnd.seed*9301+49297) % 233280; return rnd.seed/(233280.0); }
function rand(number) { return Math.ceil(rnd()*number); }

// query string parser
function parseQuery(fldNm)
	{
	var oRe = new RegExp("[\\?&]"+fldNm+"=([^&#]*)","i");
	var fldVal = oRe.exec(parent.location.search);
	return (fldVal) ? unescape(fldVal[1]) : "";
	}





window.onload = init;

function init()
	{
	rndBkg();
	modifyForm("paragraphs");
	document.reg.amount.focus();
	}