function showOrHideLayers(div_id,state)
{
	var div_state = "hidden";
	var divObj = document.getElementById(div_id);
	if(state == "show")
	    div_state = "visible";
    else if(state == "hid")
	    div_state = "hidden";
    else
	   div_state = "hidden";
	   
	divObj.style.visibility = div_state;
	
}