function getStyleObject(objectId) {

	if(document.getElementById && document.getElementById(objectId)) {

	return document.getElementById(objectId).style;

	} else if (document.all && document.all(objectId)) {

	return document.all(objectId).style;

	} else if (document.layers && document.layers[objectId]) {

	return document.layers[objectId];

	} else {

	return false;

	}

}



function changeObjectVisibility(objectId, newVisibility) {

	var styleObject = getStyleObject(objectId);

	if(styleObject) {

	styleObject.visibility = newVisibility;

	return true;

	} else {

	return false;

	}

}



function changeObjectProperty(objectId, cssProperty, newValue) {

	var styleObject = getStyleObject(objectId);

	if(styleObject) {

	eval("styleObject."+cssProperty+" = newValue");

	return true;

	} else {

	return false;

	}

}



function rollover(id, state){

	var imgObj = eval("document."+id);

	if(state == 1){

		imgObj.src = "img/"+id+"_on.jpg";

	} else {

		imgObj.src = "img/"+id+".jpg";

	}

}



function showMenu(layername) {

 	layer = layername;

	if (document.all) {

		eval ("document.all." + layer + ".style.visibility = 'visible'");

	} else {

		document.getElementById(layer).style.visibility = 'visible';

	 }

}



function hideMenu(layername) {			

	layer = layername;

	if (document.all) {

		eval ("document.all." + layer + ".style.visibility = 'hidden'");

	} else {

		document.getElementById(layer).style.visibility = 'hidden';

	 }



}



function MM_openBrWindow(theURL,winName,features) {

  var winObj;

  winObj = window.open(theURL,winName,features);

}