isIE4 = (document.all && !document.getElementById) ? true : false;
isIE5 = (document.all && document.getElementById) ? true : false;
isNS6 = (!document.all && document.getElementById) ? true : false;
isO78 = (window.opera) ? true : false;

function toggleFilter(){
	//identify the element based on browser type
	var strFilterFrame = "filter";
	var strFilterText = "filtertext";
	if (isIE4) {
		var objFrame = document.all[strFilterFrame];
		var objText = document.all[strFilterText];
	} else if (isIE5 || isNS6) {
		var objFrame = document.getElementById(strFilterFrame);
		var objText = document.getElementById(strFilterText);
	} else if(isO78) {
		var objFrame = document.getElementById(strFilterFrame);
		var objText = document.getElementById(strFilterText);
	}



	if(objFrame.style.height == "auto") {
		objFrame.style.height = "26px";
		objText.innerHTML = '<a href="#" onclick="toggleFilter();">[+]</a>';
	} else {
		objFrame.style.height = "auto";
		objText.innerHTML = '<a href="#" onclick="toggleFilter();">[-]</a>';
	}

}