numMenus = 10;
window.onerror = null;


function hideMenus() {
    changeObjectVisibility('aboutlink', 'hidden', 'none');
	
	changeObjectVisibility('researchlink', 'hidden', 'none')
	changeObjectVisibility('healthlink', 'hidden', 'none')
	changeObjectVisibility('petslink', 'hidden', 'none')
	changeObjectVisibility('poweredbylink', 'hidden', 'none')
	changeObjectVisibility('orientallink', 'hidden', 'none')
	changeObjectVisibility('contactuslink', 'hidden', 'none')
	changeObjectVisibility('link', 'hidden', 'none')
	
}

function slowHideMenus()
{

	var time = setTimeout('hideMenus()',10000);
}


function getStyleObject(objectId) {
    // cross-browser function to get an object's style object given its id
    if(document.getElementById && document.getElementById(objectId)) {
	// W3C DOM
	return document.getElementById(objectId).style;
    } else if (document.all && document.all(objectId)) {
	// MSIE 4 DOM
	return document.all(objectId).style;
    } else if (document.layers && document.layers[objectId]) {
	// NN 4 DOM.. note: this won't find nested layers
	return document.layers[objectId];
    } else {
	return false;
    }
} // getStyleObject

function showMenu(menuNumber) {
   	   
							
    if(changeObjectVisibility(menuNumber, 'visible', 'block')) {
	return true;
    } else {
	return false;
    }
}

function changeObjectVisibility(objectId, newVisibility, newDisplay) {
    // get a reference to the cross-browser style object and make sure the object exists

    var styleObject = getStyleObject(objectId);
    if(styleObject) {
	styleObject.visibility = newVisibility;
	styleObject.display = newDisplay;
	return true;
    } else {
	//we couldn't find the object, so we can't change its visibility
	return false;
    }
} // changeObjectVisibility