ie7 = (navigator.userAgent.indexOf("MSIE 7.")==-1) ? false : true;
function resizeMainCats() {	
	var catsContent = new Array();
	var heights = new Array();
	var mainNavContener = document.getElementById('mainNav');
	var cats = mainNavContener.childNodes;
		
	for (var i=0; i<(cats.length); i++) {
		catsContent[i] = cats[i].getElementsByTagName('div').item(1);
		if (catsContent[i] != null) {			
			heights[i] = catsContent[i].offsetHeight;			
		}
	}	
	maxHeight = Math.max.apply(Math,heights);
	if (ie7) {
		if (maxHeight == 114) maxHeight = 105;	
	} else {
		if (maxHeight < 105) maxHeight = 105;	
	}
	
	mainNavContener.style.height = maxHeight+10+'px';
	for (var i=0; i<=(heights.length-1); i++) {
		var tmp  = catsContent[i];
		var tmp2 = cats[i];
		tmp.style.height = maxHeight-8+'px';
		tmp2.style.height = maxHeight+5+'px';
	}
	
}