点图片上一页下一页翻页效果_图象特效


var zhang=2
function next(){
if(zhang==7){
alert("这已经是最后一张了!")
zhang=6
}
document.getElementById("tu").src=zhang+".jpg"
text.innerHTML="当前是第"+zhang+"张图片"
zhang++
}
function up(){
if(zhang==2){
alert("这已经是第一张了!")
zhang=3
}
document.getElementById("tu").src=(zhang-2)+".jpg"
text.innerHTML="当前是第"+(zhang-2)+"张图片"
zhang--
}

当前是第1张图片

//

var w=document.getElementById("tu").width//500
var h=document.getElementById("tu").height//400
document.getElementById("tu").style.width=w
document.getElementById("tu").style.height=h

//document.getElementById("divleft").style.visibility='hidden'
document.getElementById("divleft").style.width=w/2
document.getElementById("divleft").style.height=h
document.getElementById("divleft").style.left=0

//document.getElementById("divright").style.visibility='hidden'
document.getElementById("divright").style.width=w/2
document.getElementById("divright").style.height=h
document.getElementById("divright").style.left=w/2

//document.write("")

function show_div(id,img){
document.getElementById(id).innerHTML=""
}
function hide_div(id){
document.getElementById(id).innerHTML=""
}