jquery控制文本框输入数字变化后做操作
1.最简单方式绑定onkeyup事件
2.jQuery.fn.extend({
propertychange: function(fn) {
if (!+ [1, ] != true) {
$(this).get(0).addEventListener("input", fn, false)
}
$(this).bind("propertychange", fn);
return this
}
});
?以下是例子:
?
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title></title><script src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js" type="text/javascript"></script><script type="text/javascript">jQuery.fn.extend({propertychange: function(fn) {if (!+ [1, ] != true) {$(this).get(0).addEventListener("input", fn, false)}$(this).bind("propertychange", fn);return this}});</script></head><body><input id="setCont" type="text" value='啊啊'/><span id="count">5</span><script>$('#setCont').propertychange(function(){ var t = this; $('#count').text(t.value.length);});</script></body></html>