function doMenuClick(strMenuId, strImgId, strImgMenu, strImgMenuDropped){
            var objMenuId = window.document.getElementById(strMenuId);
            var objImgId = window.document.getElementById(strImgId);
	    if(objMenuId.style.display == ''){
		objMenuId.style.display = 'none';
	        objImgId.src = strImgMenuDropped;
		objImgId.width = 11;
		objImgId.height = 11;
	    }
            else
	    {
		objMenuId.style.display = '';
	        objImgId.src = strImgMenu;
		objImgId.width = 12;
		objImgId.height = 12;
	    }
	}