function getURLParameters() 
{
	var sURL = window.document.URL.toString();
	if (sURL.indexOf("?") > 0)
	{
		var arrParams = sURL.split("?");
		var arrURLParams = arrParams[1].split("&");
		var arrParamNames = new Array(arrURLParams.length);
		var arrParamValues = new Array(arrURLParams.length);
		var i = 0;
		for (i=0;i<arrURLParams.length;i++)
		{
			var sParam =  arrURLParams[i].split("=");
			arrParamNames[i] = sParam[0];
			if (sParam[1] != "") arrParamValues[i] = unescape(sParam[1]); else arrParamValues[i] = "abt_r.htm";
		}
		for (i=0;i<arrURLParams.length;i++) if (arrParamNames[i]=="main") return arrParamValues[i]; else return "abt_r.htm";
	}
	else return "abt_r.htm";
}