function LoadImages(){
    // counter     
	var i = 0;
    // create object     
	imageObj = new Image();
    // set image list     
	images = new Array();     
	images[0]="Images/btnHome_off.png"     
	images[1]="Images/btnCompany_off.png"  
	images[2]="Images/btnTour_off.png"  
	images[3]="Images/btnAwards_off.png"  
	images[4]="Images/btnPhotos_off.png"  
	images[5]="Images/btnCatering_off.png"  
	images[6]="Images/btnFan_off.png"  
	images[7]="Images/btnCareer_off.png"  
	images[8]="Images/btnLinks_off.png"  
	images[9]="Images/btnHome_on.png"     
	images[10]="Images/btnCompany_on.png"  
	images[11]="Images/btnTour_on.png"  
	images[12]="Images/btnAwards_on.png"  
	images[13]="Images/btnPhotos_on.png"  
	images[14]="Images/btnCatering_on.png"  
	images[15]="Images/btnFan_on.png"  
	images[16]="Images/btnCareer_on.png"  
	images[17]="Images/btnLinks_on.png"  
    // start preloading     
	for(i=0; i<=17; i++)      
	{          
	 	imageObj.src=images[i];   
	}

}

function showButton(elementId){
	$(document).ready(function() {
		var obj = '#' + elementId;
		var url = $(obj)[0].src;
		var newURL = url.replace('_off', '_on'); 
		$(obj)[0].src = newURL;
	});
}

function hideButton(elementId){
	$(document).ready(function() {
		var obj = '#' + elementId;
		var url = $(obj)[0].src;
		var newURL = url.replace('_on', '_off'); 
		$(obj)[0].src = newURL;
	});
}

LoadImages();