var moveStep=4 //步长,单位:pixel
var moveRelax=100 //移动时间间隔,单位:ms
ns4=(document.layers)?true:false
var displayImgAmount=4 //视区窗口可显示个数
var divWidth=220 //每块图片占位宽
var divHeight=145 //每块图片占位高
var startDnum=0
var nextDnum=startDnum+displayImgAmount
var timeID
var outHover=false
var startDivClipLeft
var nextDivClipRight
function initDivPlace(){
if (ns4){
for (i=0;i<displayImgAmount;i++){
eval("document.divOuter.document.divAds"+i+".left="+divWidth*i)
}
for (i=displayImgAmount;i<imgArr.length;i++){
eval("document.divOuter.document.divAds"+i+".left="+divWidth*displayImgAmount)
}
}else{
for (i=0;i<displayImgAmount;i++){
eval("document.all.divAds"+i+".style.left="+divWidth*i)
}
for (i=displayImgAmount;i<imgArr.length;i++){
eval("document.all.divAds"+i+".style.left="+divWidth*displayImgAmount)
}
}
}
function mvStart(){
timeID=setTimeout(moveLeftDiv,moveRelax)
}
function mvStop(){
clearTimeout(timeID)
}
function moveLeftDiv(){
if (ns4){
for (i=0;i<=displayImgAmount;i++){
eval("document.divOuter.document.divAds"+parseInt((startDnum+i)%imgArr.length)+".left=document.divOuter.document.divAds"+parseInt((startDnum+i)%imgArr.length)+".left-moveStep")
}