我想在img标签内添加一个监听器。
'<div id="111" style="height:20px; width:49.9%; float:left">'+
'<span style="float: right; margin-right: 25px; margin-top: 4px;">'+
'<img id= "',
downloadLeft_,'" style="position:absolute;" src="/public/images/excel.gif"></span></div>'
goog.events.listen(goog.dom.getElement(downloadLeft_), goog.events.EventType.CLICK, function() {
});
所以我得到了img id并将其放入goog.events.listen中。但是我得到了 goog.dom.getElement(downloadLeft_)为null。为什么getElement为null?如何在img标签内添加监听器?
答案 0 :(得分:1)
要添加侦听器,您必须具有对DOM节点的引用 - 而不是字符串。这是一个例子:
// Get a element to set the innerHTML contents on
var div = document.createElement('div');
// Add html created by strings
div.innerHTML = '<span style="float: right; margin-right: 25px; margin-top: 4px;">'+
'<img id= "' + downloadLeft_ + '" style="position:absolute;" ' +
'src="/public/images/excel.gif"></span>';
// Add the div to the document
document.documentElement.appendChild(div);
// Get a reference to the image element
var img = document.getElementById(downloadLeft_);
// Add listener
goog.events.listen(goog.dom.getElement(downloadLeft_),
goog.events.EventType.CLICK, function() {
//event listener code
});