JavaScript图片放大的使用案例

样式
.trans_msg
{
filter:alpha(opacity=100,enabled=1) revealTrans(duration=.2,transition=1) blendtrans(duration=.2);
}
*/
//--初始化变量--
var rT=true;//允许图像过渡
var bT=true;//允许图像淡入淡出
var tw=150;//提示框宽度
var endaction=false;//结束动画
var ns4 = document.layers;
var ns6 = document.getElementById && !document.all;
var ie4 = document.all;
offsetX = 10;
offsetY = 20;
var toolTipSTYLE=;
function initToolTips()
{
tempDiv = document.createElement(div);
tempDiv.id = toolTipLayer;
tempDiv.style.position = absolute;
tempDiv.style.display = none;
document.body.appendChild(tempDiv);
if(ns4||ns6||ie4)
{
if(ns4) toolTipSTYLE = document.toolTipLayer;
else if(ns6) toolTipSTYLE = document.getElementById(toolTipLayer).style;
else if(ie4) toolTipSTYLE = document.all.toolTipLayer.style;
if(ns4) document.captureEvents(Event.MOUSEMOVE);
else
{
toolTipSTYLE.visibility = visible;
toolTipSTYLE.display = none;
}
document.onmousemove = moveToMouseLoc;
}
}
function toolTip(msg, fg, bg)
{
try {
if(toolTip.arguments.length < 1) // hide
{
if(ns4)
{
toolTipSTYLE.visibility = hidden;
}
else
{
//--图象过渡，淡出处理--
if (!endaction) {toolTipSTYLE.display = none;}
if (rT) document.all(msg1).filters[1].Apply();
if (bT) document.all(msg1).filters[2].Apply();
document.all(msg1).filters[0].opacity=0;
if (rT) document.all(msg1).filters[1].Play();
if (bT) document.all(msg1).filters[2].Play();
if (rT){
if (document.all(msg1).filters[1].status==1 || document.all(msg1).filters[1].status==0){
toolTipSTYLE.display = none;}
}
if (bT){
if (document.all(msg1).filters[2].status==1 || document.all(msg1).filters[2].status==0){
toolTipSTYLE.display = none;}
}
if (!rT && !bT) toolTipSTYLE.display = none;
//----------------------
}
}
else // show
{
if(!fg) fg = #777777;
if(!bg) bg = #eeeeee;
var content =
'

' + ' ' + msg + '

';

if(ns4)
{
toolTipSTYLE.document.write(content);
toolTipSTYLE.document.close();
toolTipSTYLE.visibility = visible;
}
if(ns6)
{
document.getElementById(toolTipLayer).innerHTML = content;
toolTipSTYLE.display='block'
}
if(ie4)
{
document.all(toolTipLayer).innerHTML=content;
toolTipSTYLE.display='block'
//--图象过渡，淡入处理--
var cssopaction=document.all(msg1).filters[0].opacity
document.all(msg1).filters[0].opacity=0;
if (rT) document.all(msg1).filters[1].Apply();
if (bT) document.all(msg1).filters[2].Apply();
document.all(msg1).filters[0].opacity=cssopaction;
if (rT) document.all(msg1).filters[1].Play();
if (bT) document.all(msg1).filters[2].Play();
//----------------------
}
}
} catch(e) {}
}
function moveToMouseLoc(e)
{
var scrollTop = getScrollTop();
var scrollLeft = getScrollLeft();
if(ns4||ns6)
{
x = e.pageX + scrollLeft;
y = e.pageY - scrollTop;
}
else
{
x = event.clientX + scrollLeft;
y = event.clientY;
}

if (x-scrollLeft > getViewportWidth() / 2) {
x = x - document.getElementById(toolTipLayer).offsetWidth - 2 * offsetX;
}

if ((y+document.getElementById(toolTipLayer).offsetHeight+offsetY)>getViewportHeight()) {
y = getViewportHeight()-document.getElementById(toolTipLayer).offsetHeight-offsetY;
}
toolTipSTYLE.left = (x + offsetX)+'px';
toolTipSTYLE.top = (y + offsetY + scrollTop)+'px';
return true;
}
initToolTips();

 

 

效果：