js sample code to determine whether a control has focus_javascript skills

JS determines that an object has received focus document.activeElement.tagName //tagName tag name

Example: Determine whether to close the input method when the body gets the cursor.

Copy code The code is as follows:

var act = document.activeElement.tagName. toLowerCase();
if(act.indexOf("body") != -1 || act.indexOf("html") != -1)
{
document.body.style.imeMode = 'disabled';
}

<script><br>function test(){<br>var srcElem = document.activeElement<br>var testval = srcElem.name; //id and name are more commonly used and should be <br>alert("control" testval "Get focus");<br>}<br></script>