function preLoader()
{
imageObj = new Image();
imageObj.onLoad=imagesLoaded();

var imageArray = ['images/1.jpg','images/2.jpg','images/3.jpg','images/4.jpg','images/5.jpg','images/6.jpg','images/7.jpg','images/8.jpg','images/9.jpg','images/10.jpg','images/11.jpg','images/gradientmenu.jpg','images/office.jpg','images/house1.gif'];

for(i=0; i<imageArray.length; i++){
 imageObj.src=imageArray[i];
}

}

function imagesLoaded()
{    
 if(!document.getElementById || !document.createTextNode)
 {
	   return;

 }
 var id = document.getElementById('divAll');
 id.style.visibility='visible';
	//alert('preloaded');
}