//¸Ä±äͼƬ´óС
window.onload=function()
{
	var pic_array=document.images;
	var pic_num=pic_array.length;
	var width=500;
	var height=80;
	var offset_height;
	var offset_width;
	var nh=1;
	for (var i=0;i<pic_num;i++)
	{
		offset_height = pic_array[i].offsetHeight;
		offset_width = pic_array[i].offsetWidth;
		if(offset_width>width)
		{
			nh = width/offset_width;
			pic_array[i].height = offset_height*nh;
			pic_array[i].width = width;
		}
	}	
}
function initnavbar(channel)
{
	document.getElementById("c0").className = "nsel_nav";
	switch(channel)
	{
		case 1:
		{
			document.getElementById("c1").className = "sel_nav";
			break;
		}
		case 1001:
		{
			document.getElementById("c2").className = "sel_nav";
			break;
		}
		case 1002:
		{
			document.getElementById("c3").className = "sel_nav";
			break;
		}
		case 1003:
		{
			document.getElementById("c4").className = "sel_nav";
			break;
		}
		case 1004:
		{
			document.getElementById("c5").className = "sel_nav";
			break;
		}
		case 1005:
		{
			document.getElementById("c6").className = "sel_nav";
			break;
		}
		default:
		{
			document.getElementById("c0").className = "sel_home";
			break;
		}
	}
	
}
function doZoom(size)
{
	document.getElementById('zoom').style.fontSize=size+'px';
	document.getElementById('zoom').style.lineHeight=(size+8)+'px';
}

function Request(strName)
{
	var strHref = document.location.toString();
	var intPos = strHref.indexOf("?");
	var strRight = strHref.substr(intPos + 1);
	var arrTmp = strRight.split("&");
		for(var i = 0; i < arrTmp.length; i++)
		{
			var arrTemp = arrTmp[i].split("=");
			if(arrTemp[0].toUpperCase() == strName.toUpperCase())
			return arrTemp[1];
		}
		return "";
}

function Redirect()
{
	pgNum = "";
	classid="";
	channelid="";
	pgNum = document.getElementById("page_txt").value;

	if(pgNum!="")
	{
		if(Request("class")!="")
		{
			classid = "&class=" + Request("class");
		}
		if(Request("channel")!="")
		{
			channelid = "&channel=" + Request("channel");
		}
		window.location="ArtClass.aspx?"+classid+channelid+"&page="+pgNum;
	}
}

function EnterRedirect(obj)
{
	if(obj.value!="")
	{
		if(13 == event.keyCode)
		{
			Redirect();
		}
	}
}