JS网页图片查看器(兼容IE、FF)可控制图片放大缩小移动

修正了网上其它版本的一些错误。完美无错版

JS网页图片查看器－可控制图片放大缩小还原移动效果

body { font-family: "Verdana", "Arial", "Helvetica", "sans-serif"; font-size: 12px; line-height: 180%; }
td { font-size: 12px; line-height: 150%; }

drag = 0
move = 0

// 拖拽对象
// 参见：http://blog.sina.com.cn/u/4702ecbe010007pe
var ie=document.all;
var nn6=document.getElementById&&!document.all;
var isdrag=false;
var y,x;
var oDragObj;

function moveMouse(e) {
if (isdrag) {
oDragObj.style.top = (nn6 ? nTY + e.clientY - y : nTY + event.clientY - y)+"px";
oDragObj.style.left = (nn6 ? nTX + e.clientX - x : nTX + event.clientX - x)+"px";
return false;
}
}

function initDrag(e) {
var oDragHandle = nn6 ? e.target : event.srcElement;
var topElement = "HTML";
while (oDragHandle.tagName != topElement && oDragHandle.className != "dragAble") {
oDragHandle = nn6 ? oDragHandle.parentNode : oDragHandle.parentElement;
}
if (oDragHandle.className=="dragAble") {
isdrag = true;
oDragObj = oDragHandle;
nTY = parseInt(oDragObj.style.top+0);
y = nn6 ? e.clientY : event.clientY;
nTX = parseInt(oDragObj.style.left+0);
x = nn6 ? e.clientX : event.clientX;
document.onmousemove=moveMouse;
return false;
}
}
document.onmousedown=initDrag;
document.onmouseup=new Function("isdrag=false");

function clickMove(s){
if(s=="up"){
dragObj.style.top = parseInt(dragObj.style.top) + 100;
}else if(s=="down"){
dragObj.style.top = parseInt(dragObj.style.top) - 100;
}else if(s=="left"){
dragObj.style.left = parseInt(dragObj.style.left) + 100;
}else if(s=="right"){
dragObj.style.left = parseInt(dragObj.style.left) - 100;
}

}

function smallit(){
var height1=images1.height;
var width1=images1.width;
images1.height=height1/1.2;
images1.width=width1/1.2;
}

function bigit(){
var height1=images1.height;
var width1=images1.width;
images1.height=height1*1.2;
images1.width=width1*1.2;
}
function realsize()
{
images1.height=images2.height;
images1.width=images2.width;
block1.style.left = 0;
block1.style.top = 0;

}
function featsize()
{
var width1=images2.width;
var height1=images2.height;
var width2=360;
var height2=200;
var h=height1/height2;
var w=width1/width2;
if(height1w)
{
images1.height=height2;
images1.width=width1*height2/height1;
}
else
{
images1.width=width2;
images1.height=height1*width2/width1;
}
}
block1.style.left = 0;
block1.style.top = 0;
}

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