AJAX初级聊天室代码(3)

function overInput(a){
    getId("btn").style.border = "1px solid #54ce43"
    getId("inputs").style.border = "1px solid #54ce43"
    focs()
}
function outInput(a){
    getId("btn").style.border = "1px solid #AAA"
    getId("inputs").style.border = "1px solid #AAA"
    focs()
}
function overBtn(a){
    a.src = "images/hover.gif"
}
function outBtn(a){
    a.src = "https://www.jb51.net/images/rest.gif"
}
function lrover(a){
    a.style.backgroundColor = "#EEE"
}
function lrout(a){
    a.style.backgroundColor = "#FFF"    
}
function focs(){
    getName("inputs").focus();
}
function clean(){
    getName("inputs").value = ""
}
var chats = new Array()
var chatStart
function addChat(strChat){
    if(chats.length > 199){
        chats.shift()
    }
    chats.push(strChat)
    chatStart = chats.length
}
function preChat(){
    if(chatStart && chatStart >= 1){
        if(chatStart == 1){
            getName("inputs").value = chats[0]
            chatStart = 0.5
        }else{
            chatStart -= 1
            getName("inputs").value = chats[chatStart]
        }
    }
    getId("loadifo").innerHTML = chatStart+","+chats.length
}
function nextChat(){
    if(chatStart && chatStart < chats.length && chats.length > 1){
        if(chatStart == 0.5){
            chatStart = 1
        }else if(chatStart == chats.length - 1){
            chatStart = chats.length - 1
        }else{
            chatStart += 1
        }
        getName("inputs").value = chats[chatStart]
    }
    getId("loadifo").innerHTML = chatStart+","+chats.length
}

主ASP程序文件:请保存为chat.asp

程序代码