?? togglepre.js
字號(hào):
var MinPreHeight = 450;
var MinPreChars = 750;
var PreOpen = new Image();
var PreClose = new Image();
PreOpen.src="/images/plus.gif";
PreClose.src="/images/minus.gif";
function togglePre()
{
var id = this.getAttribute("preid");
var preelm = document.getElementById("pre" + id);
var imgelm = document.getElementById("preimg" + id);
var togelm = document.getElementById("precollapse" + id);
if (preelm.style.display != 'none')
{
if (document.all) togelm.innerText = " Expand code snippet";
else
{
document.getElementById("premain" + id).className = "precollapse";
togelm.firstChild.nodeValue = " Expand code snippet";
}
preelm.style.display = 'none';
imgelm.setAttribute("src", PreOpen.src);
}
else
{
if (document.all) togelm.innerText = " Collapse";
else
{
document.getElementById("premain" + id).className = "smallText";
togelm.firstChild.nodeValue = " Collapse";
}
preelm.style.display = 'block';
imgelm.setAttribute("src", PreClose.src);
}
}
function InitTogglePre()
{
var articleText = document.getElementById("contentdiv");
var pres = articleText.getElementsByTagName("pre");
for (var i=0; i<pres.length; i++)
{
if (pres[i].offsetHeight == 0)
{
if (pres[i].innerText.length < MinPreChars) continue;
}
else if (pres[i].offsetHeight < MinPreHeight)
continue;
var main = document.createElement("div");
main.style.width="100%";
main.setAttribute("id", "premain" + i.toString());
elm = document.createElement("img");
elm.setAttribute("id", "preimg" + i.toString());
elm.setAttribute("src", PreClose.src);
if (document.all) elm.style.cursor = "hand";
elm.setAttribute("height", 9);
elm.setAttribute("width", 9);
elm.setAttribute("preid", i);
elm.onclick = togglePre;
main.appendChild(elm);
elm = document.createElement("span");
elm.setAttribute("id", "precollapse" + i.toString());
if (document.all)
{
main.className = "precollapse";
elm.innerText = " Collapse";
elm.style.cursor = "hand";
}
else
{
main.className = "smallText";
//This is lame. Why can't W3C just allow innerText on spans??
var new_el = document.createTextNode(" Collapse");
elm.appendChild(new_el);
}
elm.style.marginBottom = 0;
elm.onclick = togglePre;
elm.setAttribute("preid", i);
main.appendChild(elm);
pres[i].setAttribute("id", "pre" + i.toString());
pres[i].style.marginTop = 0;
var parent = pres[i].parentNode;
parent.insertBefore(main, pres[i]);
}
}
InitTogglePre();
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