function getParam(paramName) {
    var sURL = window.document.URL.toString();
    var strReturn = null;
    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] = "No Value";
	    }
	}
	for (i=0;i<arrURLParams.length;i++) {
	    if(arrParamNames[i] == paramName){
		strReturn = arrParamValues[i];
		break;
	    }
	}
    }
    return strReturn;
}