// JavaScript Document

// 初始化菜单栏背景 ID代表是第几项菜单
function top_menu_chushihua(id, isChushihua)
{

	bg1 = "images/top_menu_4_bg1.jpg";
	bg2 = "images/top_menu_4_bg2.jpg";
	if(oldid != 0)
	{
		if(isChushihua == 1)
		{
			id = oldid;
		}
	
		for(i=1; i<7; i++)
		{
			bg = "";
			if(i == id)
			{
				bg = bg2;
			}
			else
			{
				bg = bg1;
			}		
					
			ids = "top_menu_" + i;
			document.getElementById(ids).style.background = "url(" + bg + ")";
		}
	}
	else
	{
		for(i=1; i<7; i++)
		{
			bg = "";
			if(i == id)
			{
				bg = bg2;
			}
			else
			{
				bg = bg1;
			}
			ids = "top_menu_" + i;
			document.getElementById(ids).style.background = "url(" + bg + ")";
		}
	}
}

function top_menu(id, clickStatus)
{
	// clickStatus 1为鼠标移到，2为鼠标移出
	if(clickStatus == 1)
	{
		top_menu_chushihua(id, 0);
	}
	else
	{
		top_menu_chushihua(id, 1);
	}
}

function yz()
{
	if (searchForm.key.value.length <=0)
	{
		alert('请输入要查询的关键字！'); 
		searchForm.key.focus();
		return false; 
	}
	else
	{			
		var patrn = /[and|or|?|%|*]/;
		if (patrn.exec(searchForm.key.value)){
			alert('查询关键字不能含有' + searchForm.key.value + "！"); 
			return false;
		}
	}
}