function filter(id)
{
	var ua = navigator.userAgent.toLowerCase();
	isGecko = (ua.indexOf("gecko") != -1);

	if(id==1) {
		document.getElementById("filter_dop").style.display='none';
		document.getElementById("filter_pro").style.display='block';
		document.getElementById("filter_1").style.borderTop='1px solid #c6c5c0';
		document.getElementById("filter_2").style.borderTop='1px solid #a7a59e';
		document.getElementById("filter_2").style.backgroundImage='url(/img/flt_btn.gif)';
		document.getElementById("filter_3_i").style.backgroundImage='url(/img/flt_sep_2.gif)';
		document.getElementById("filter_2_a").style.textDecorationUnderline='false';
		
		document.getElementById("filter_1_i").style.backgroundImage='url(/img/flt_sep_left_b.gif)';
		document.getElementById("filter_1").style.backgroundImage='none';
		document.getElementById("filter_1").style.backgroundColor='#f2f0ea';
		document.getElementById("filter_1_a").style.textDecoration='none';
		document.getElementById("filter_2_a").style.textDecoration='';//underline
		document.getElementById("filter_2_i").style.backgroundImage='url(/img/flt_sep_right.gif)';
		document.getElementById('filter_1_a').style.color='#175d86';
		document.getElementById('filter_2_a').style.color='';
		if (!isGecko) {
			document.getElementById('filter_1_a').style.cursor='default';
			document.getElementById('filter_2_a').style.cursor='hand';
		}
	} else if(id==2) {
		document.getElementById("filter_pro").style.display='none';
		document.getElementById("filter_dop").style.display='block';
		document.getElementById("filter_2").style.borderTop='1px solid #c6c5c0';
		document.getElementById("filter_1").style.borderTop='1px solid #a7a59e';
		document.getElementById("filter_1_i").style.backgroundImage='url(/img/flt_sep_1.gif)';
		document.getElementById("filter_1").style.backgroundImage='url(/img/flt_btn.gif)';
		document.getElementById("filter_1_a").style.textDecorationUnderline='true';
		
		document.getElementById("filter_2_i").style.backgroundImage='url(/img/flt_sep_left.gif)';
		document.getElementById("filter_2").style.backgroundImage='none';
		document.getElementById("filter_2").style.backgroundColor='#f2f0ea';
		document.getElementById("filter_2_a").style.textDecoration='none';
		document.getElementById("filter_1_a").style.textDecoration='';//underline
		document.getElementById("filter_3_i").style.backgroundImage='url(/img/flt_sep_right.gif)';
		document.getElementById('filter_2_a').style.color='#175d86';
		document.getElementById('filter_1_a').style.color='';	
		if (!isGecko) {
			document.getElementById('filter_2_a').style.cursor='default';
			document.getElementById('filter_1_a').style.cursor='hand';
		}
	}	
}