function chChange(o)
{
	var obt;
	var obArea;
	var obl = document.Form1.l;
	var obType = document.Form1.t;
	obl.length = 0;
	
	for(var i=1;i<=3;i++)
	{
		obt = document.getElementById("ch"+i);
		obArea = document.getElementById("chArea"+i);
		if(i!=o)
		{
			obt.style.color = "#b89c42";
			obt.background = "/Search/Images/channel_bg_1.gif";
			obArea.style.display = "none";
		}
		else
		{
			obt.style.color = "#FFFFFF";
			obt.background = "/Search/Images/channel_bg_2.gif";
			obArea.style.display = "block";
		}
	}
	if(o==1)
	{
		obType.value = "TXT";
		obl.options[0] = new Option("新闻","News");
		obl.options[1] = new Option("设计","Design");
		obl.options[2] = new Option("工程","Project");
		obl.options[3] = new Option("园艺","YuanYi");
		obl.options[4] = new Option("景观","JingGuan");
	}
	if(o==2)
	{
		obType.value = "IMG";
		obl.options[0] = new Option("植物库","Flora");
		obl.options[1] = new Option("设计图","Design");
		obl.options[2] = new Option("工程图","Project");
		obl.options[3] = new Option("城市景观","jgCity");
		obl.options[4] = new Option("名园欣赏","jgGarden");
	}
	if(o==3)
	{
		obType.value = "B2B";
		obl.options[0] = new Option("供应信息","Sell");
		obl.options[1] = new Option("求购信息","Buy");
		obl.options[2] = new Option("产品库","Product");
		obl.options[3] = new Option("黄页","114");
	}
}

function pdChanage(o)
{
	var obl = document.Form1.l;
	for(var i=0;i<obl.length;i++)
	{
		if(obl.options[i].text == o)
		{
			obl.selectedIndex = i;
		}
	}
}

function pdChanageByValue(o)
{
	var obl = document.Form1.l;
	for(var i=0;i<obl.length;i++)
	{
		if(obl.options[i].value == o)
		{
			obl.selectedIndex = i;
		}
	}
}

function chChangeOnlyLayer(o)
{
	var obt;
	var obArea;
	for(var i=1;i<=3;i++)
	{
		obt = document.getElementById("ch"+i);
		obArea = document.getElementById("chArea"+i);
		if(i!=o)
		{
			obt.style.color = "#b89c42";
			obt.background = "/Search/Images/channel_bg_1.gif";
			obArea.style.display = "none";
		}
		else
		{
			obt.style.color = "#FFFFFF";
			obt.background = "/Search/Images/channel_bg_2.gif";
			obArea.style.display = "block";
		}
	}
}

function ImgReSize(o)
{
	if(o.width/o.height > 1)
	{
		if(o.width>140){o.width=100;}
	}
	else
	{
		if(o.height>140){o.height=100;}
	}
}