function tab(show) {
	
	var tabName = "home-search-tab-";
	var divName = "home-search-";
	
	var tabs = new Array("size","brand","keyword");

	for (x in tabs) {
		document.getElementById(divName + tabs[x]).style.display = 'none';
		document.getElementById(tabName + tabs[x]).className = '';
	}
	
	document.getElementById(divName + show).style.display = 'block';
	document.getElementById(tabName + show).className = 'active';
}

function clearField(el) {
	if (el.value == el.defaultValue) {
		el.value = "";
	}
}

function fillField(el) {
	if (el.value == "") {
		el.value = el.defaultValue;
	}
}