1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 2 <html xmlns="http://www.w3.org/1999/xhtml"> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html;charset=UTF-8" /> 5 <title>input输入框(blur,change,focus)</title> 6 <script type="text/javascript" src="eventutil.js"></script> 7 </head> 8 <body> 9 <form action="#" method="post"> 10 <input type="text" /> 11 </form> 12 <script type="text/javascript" src="test02.js"></script> 13 </body> 14 </html>
1 var textbox = document.forms[0].elements[0]; 2 3 EventUtil.addHandler(textbox, "focus", function(event) { 4 event = EventUtil.getEvent(event); 5 var target = EventUtil.getTarget(event); 6 7 if (target.style.backgroundColor != "red") { 8 target.style.backgroundColor = "yellow"; 9 } 10 }); 11 12 EventUtil.addHandler(textbox, "blur", function(event) { 13 event = EventUtil.getEvent(event); 14 var target = EventUtil.getTarget(event); 15 16 if (/[^\d]/.test(target.value)) { 17 target.style.backgroundColor = "red"; 18 } else { 19 target.style.backgroundColor = ""; 20 } 21 }); 22 23 EventUtil.addHandler(textbox, "change", function(event) { 24 event = EventUtil.getEvent(event); 25 var target = EventUtil.getTarget(event); 26 27 if (/[^\d]/.test(target.value)) { 28 target.style.backgroundColor = "red"; 29 } else { 30 target.style.backgroundColor = ""; 31 } 32 });