function hideBtn(btnName1,btnName2,divName){
	//alert(btnName);
	document.getElementById(btnName1).style.display = "none";
	document.getElementById(btnName2).style.display = "";
	
	var chk_div = document.getElementById(divName);
	
	if ( chk_div.style.display=='block' ) {
	chk_div.style.display='none';
	}
	else if ( chk_div.style.display=='none' ) {
	chk_div.style.display='block';
	}

}