function displaySubMenu(li) {
	var subMenu = li.getElementsByTagName("ul")[0];
	subMenu.style.display = "block";
}
function hideSubMenu(li) {
	var subMenu = li.getElementsByTagName("ul")[0];
	subMenu.style.display = "none";
}
var a,b,c;
function b1(arg)
{
	if(arg=='quyu')
	{
		xx=a;
	}
	if(arg=='jiage')
	{
		xx=b;
	}
	if(arg=='wy')
	{
		xx=c;
	}
	if(document.getElementById(arg+"0").checked)
	{
		for(var i=1;i<xx;i++)
		{
			document.getElementById(arg + i).checked=false;
		}
	}
	else
	{
		ch=0;
		for(var i=1;i<xx;i++)
		{
			if(document.getElementById(arg + i).checked)
			{
				ch=1;
			}
		}
		if(ch==0)
		{
			alert('请至少选中一个选项！');
			document.getElementById(arg+"0").checked=true;
		}
	}
}
function c1(arg)
{
	if(arg=='quyu')
	{
		xx=a;
	}
	if(arg=='jiage')
	{
		xx=b;
	}
	if(arg=='wy')
	{
		xx=c;
	}
	var ch;
	ch=0;
	for(var i=1;i<xx;i++)
	{
		if(document.getElementById(arg + i).checked)
		{
			ch=1;
		}
	}
	if(ch==1)
	{
	document.getElementById(arg+"0").checked=false;
	}
	else
	{
		document.getElementById(arg+"0").checked=true;
	}
}
function showlist(arg)
{
	document.getElementById("quyudiv").style.display='none';
	document.getElementById("jiagediv").style.display='none';
	document.getElementById("wydiv").style.display='none';
	document.getElementById(arg).style.display='';
}
function ch1()
{
	document.getElementById("btn_topsearch").style.backgroundImage='url(images/btn_navpagesearch.jpg)';
}
function ch2()
{
	document.getElementById("btn_topsearch").style.backgroundImage='url(images/btn_search.jpg)';
}