function opencat(cat)
{
    if(document.getElementById(cat).style.display=="none"){
		document.getElementById(cat).style.display="block";
	}else{
		document.getElementById(cat).style.display="none"; 
	}
}

String.prototype.getQuery = function(name)
{
	var reg = new RegExp("(^|&)"+ name +"=([^&]*)(&|$)");
	var r = this.substr(this.indexOf("\?")+1).match(reg);
	if (r!=null) return unescape(r[2]); return null;
}
var str = location.href;
var preNavi = str.getQuery("preNavi");
var subNavi = str.getQuery("subNavi");
var trdNavi = str.getQuery("trdNavi");
if (preNavi != null)
{
	document.getElementById("C"+preNavi).style.display = '';
	if (subNavi != null)
	{
		document.getElementById("N_"+preNavi+"_"+subNavi).className = 'menu1_over';
		document.getElementById("N_"+preNavi+"_"+subNavi).onmouseover = null;
		document.getElementById("N_"+preNavi+"_"+subNavi).onmouseout = null;
		if (trdNavi != null)
		{
			document.getElementById("C_"+preNavi+"_"+subNavi).style.display = '';
			document.getElementById("C_"+preNavi+"_"+subNavi+"_"+trdNavi).className = 'menu2_over';
			document.getElementById("C_"+preNavi+"_"+subNavi+"_"+trdNavi).onmouseover = null;
			document.getElementById("C_"+preNavi+"_"+subNavi+"_"+trdNavi).onmouseout = null;
		}
	}
}