function showhide(divname) {
    var ob = document.getElementById(divname);

    if(document.defaultView) {
        var cstyle = document.defaultView.getComputedStyle(ob, "");
	if (cstyle) {
	    var dval = cstyle.getPropertyValue("display");
	} else {
	    var dval = ob.style.display;
	}
    } else {
        var dval = ob.style.display;
    }
    
    if (dval == "none") {
        var tn = ob.tagName.toLowerCase();
        if (tn == "a") {
            ob.style.display = "inline";
        } else {
            ob.style.display = "block";
        }
    } else {
        ob.style.display = "none";
    }
}