长度和宽度自动缩放
高度自动height:expression(document.180.clientWidth < 180? "180px": "auto" );
宽度限制
class="imgzoom"
.imgzoom img {behavior: url("${base}/styles/imgzoom.htc");
<script language="javascript">
var _width = element.width;
var _hieght = element.height;
var _maxpixel = _width;
var _which = "w";
var maxwidth = 680;
var maxheight = 680;
//element.onmousewheel = test;
if (element.width > maxwidth) {
element.width = maxwidth;
element.removeAttribute("height");
if (element.parentElement.tagName != "A"){
var _html = "";
_html += "<a href=\""+element.src+"\" target=\"_blank\">";
_html += element.outerHTML;
_html += "</a>";
element.outerHTML = _html;
}
}
/*
if (height > _width) {
_maxpixel = _hieght;
_which = "h";
}
if (_which == "w") {
if (element.width > maxwidth) {
element.width = maxwidth;
element.removeAttribute("height");
}
}
else {
if (element.height > maxheight) {
element.height = maxheight;
element.removeAttribute("width");
}
}*/
function test() {
return zoomimg(element)
}
function zoomimg(pic){
var zoom=parseInt(pic.style.zoom,10)||100;
zoom+=event.wheelDelta/12;
if (zoom>0) pic.style.zoom=zoom+'%';
return false;
}
</script>
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