填空题 说明中的链接测试页面实现的功能是：如果10秒链接不上指定网站，则显示“链接超时”，否则显示链接时间(单位为秒)。请根据以上功能描述，补齐代码：
……
＜script＞
tim=1 //时间初值
(1) ("tim++", 100); //定时调用时间设定
bTestFinish=0
c=1
var b=1
var autour1=new Array()
autorul[1] ="61.236.219.100 "
autorul[2] ="220.181.26.132" //测试网站IP地址
function butt()

document.write("＜form name = autof＞")
for(var i=1; i＜autour1. lenght; i++)

if(i==1 || i==3 || i==5)

document.write("＜input type=text class=noborder name=url" + i + "
value=htttp: //" + autour1[i] + " ＆nbsp; size=40＞→＆nbsp; ＆nbsp; ＜input type= text name=txt" + i + " size = 10 class = noborder value =测试中……＞＜br＞＜br＞")

else

document.write("＜ input type = text class = noborder name = url " + i + " value = htttp://" + autour1[i] + " ＆nbsp; size = 40＞ →＆nbsp; ＆nbsp; ＜ input type = text name = txt " + i + " size = 10 class = noborder value = 测试中……＞＜br＞＜br＞")


document. write("＜br＞＜div align = 'center'＞＜input type = submit value =重新测试＞＜/div＞＜/form＞ ") //初始测试页面

butt()
function auto(c)

if(tim ＞ (2) )
document .forms[0]["txt" + c].value = "链接超时"
else
document .forms[0]["txt" + c]. value = "时间" + tim/10 + "秒"
//测试结果判断
function run()

for(var i=1; i＜autour1.lenght; i++)

document.write("＜img src=http://" + autour1[i] + " / " + Math. random() + " width = 1 height = 1 onerror = (3) ('" + i + "')＞ ");

//运行测试
run();
＜/script＞