function showCenteralDiv(divId)
{
	var divObj = document.getElementById(divId);
	divObj.style.visibility='visible';
	divObj.style.display='block';
	divObj.style.position="absolute";
	
//	objW = divObj.style.width ;
//	objH = divObj.style.pixelHeight ;	
	divObj.style.top  = document.body.offsetHeight /3   ;
	divObj.style.left = document.body.offsetWidth /3;
	divObj.style.zIndex = 100;
}

function hideDiv(divId)
{
	var divObj = document.getElementById(divId);
	divObj.style.visibility='hidden';
}