参考 MSDN 网页给 HTML 标签绑定 click 事件：
function makeFoldersCollapsible(folderIcon, openFolderIcon, pathToIcons, initializeHandler) { ???var elements = document.getElementsByClassName("folder"); ???var length = elements.length; ???for (var i = 0; i < length; i++) { ???????var folder = elements[i]; ???????folder.style.display = ‘none‘; ???????folder.initialize = initializeHandler; ???????var div = folder.previousSibling; ???????var firstChild = div.firstChild; ???????var imagePlusMinus = document.createElement("img"); ???????imagePlusMinus.src = pathToIcons + "plus.png"; ???????imagePlusMinus.className = "imagePlusMinus"; ???????var imageFolder = document.createElement("img"); ???????imageFolder.src = pathToIcons + folderIcon; ???????imageFolder.className = "imageFolder"; ???????setFolderImage(imageFolder, div, firstChild, pathToIcons, folderIcon); ???????var handler = expandCollapseFolder(folder, imagePlusMinus, imageFolder, div, firstChild, pathToIcons, folderIcon, openFolderIcon); ???????var skipImage = isLink(firstChild); ???????if (skipImage) { ???????????div.insertBefore(imagePlusMinus, firstChild); ???????????imagePlusMinus.onclick = handler; ???????} else { ???????????div.insertBefore(imageFolder, firstChild); ???????????div.insertBefore(imagePlusMinus, imageFolder); ???????????div.onclick = handler; ???????} ???}}function isLink(element) { ???return element && element.tagName && element.tagName == "A";}function expandCollapseFolder(capturedFolder, capturedPlusMinus, capturedFolderImage, capturedDiv, capturedFirstChild, pathToIcons, folderIcon, openFolderIcon) { ???return function () { ???????if (capturedFolder.style.display == ‘none‘) { ???????????capturedPlusMinus.src = pathToIcons + "minus.png"; ???????????if (capturedDiv.className != "projectCSInSolution" && capturedDiv.className != "projectVBInSolution") { ???????????????capturedFolderImage.src = pathToIcons + openFolderIcon; ???????????} ???????????if (capturedFolder.initialize) { ???????????????capturedFolder.initialize(capturedFolder); ???????????????capturedFolder.initialize = null; ???????????} ???????????capturedFolder.style.display = ‘block‘; ???????} ???????else { ???????????capturedPlusMinus.src = pathToIcons + "plus.png"; ???????????setFolderImage(capturedFolderImage, capturedDiv, capturedFirstChild, pathToIcons, folderIcon); ???????????capturedFolder.style.display = ‘none‘; ???????} ???}}参考：
https://referencesource.microsoft.com/
Html 标签的事件绑定（转自 MSDN）
原文地址：http://www.cnblogs.com/hellowzl/p/7646836.html