SOURCE

console 命令行工具 X clear 

                    

                        
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console

            
function getfocus()
{document.getElementById('myAnchor').focus()}

function losefocus()
{document.getElementById('myAnchor').blur()}

            
<a id="myAnchor" href="http://jsrun.net">访问 JSRUN.NET</a> 
 <br>
 <br> 
 <input type="button" onclick="getfocus()" value="获得焦点"> 
 <input type="button" onclick="losefocus()" value="失去焦点">