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JavaScript method to implement customized hover and focus effects for input and textarea_javascript skills

WBOY
Release: 2016-05-16 15:43:49
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本文实例讲述了JavaScript实现为input与textarea自定义hover,focus效果的方法。分享给大家供大家参考。具体如下:

这里演示JavaScript为input输入框和textarea文本框自定义hover,focus效果,hover也就是鼠标放上去之后的效果,focus是鼠标焦点问题,要实现 这种效果,需要JS来配合,这个例子就是很不错的,它把网页上输入框和文本框都加入了鼠标悬停和鼠标焦点效果。

运行效果截图如下:

在线演示地址如下:

http://demo.jb51.net/js/2015/js-input-textarea-hover-focus-style-codes/

具体代码如下:

<title>JavaScript为input/textarea自定义hover,focus效果</title>
<script type="text/javascript">
function suckerfish(type, tag, parentId) { 
if (window.attachEvent) { 
window.attachEvent("onload", function() { 
var sfEls = (parentId==null)&#63;document.getElementsByTagName(tag):document.getElementById(parentId).getElementsByTagName(tag); 
type(sfEls); 
}); 
} 
} 
sfHover = function(sfEls) { 
for (var i=0; i < sfEls.length; i++) { 
sfEls[i].onmouseover=function() { 
this.className+=" iptHover"; 
} 
sfEls[i].onmouseout=function() { 
this.className=this.className.replace(new RegExp(" iptHover\\b"), ""); 
} 
} 
} 
sfFocus = function(sfEls) { 
for (var i=0; i < sfEls.length; i++) { 
sfEls[i].onfocus=function() { 
this.className+=" iptFocus"; 
} 
sfEls[i].onblur=function() { 
this.className=this.className.replace(new RegExp(" iptFocus\\b"), ""); 
} 
} 
}
</script>
<style type="text/css">
textarea{
border:1px solid #BBE1F1;
width:250px;
height:80px;
}
 .iptHover,input:hover,textarea:hover{
border:1px solid #77C2E3;
}
.iptFocus,input:focus,textarea:focus{
border:1px solid #77C2E3;
background-color:#EFF7FF;
}
</style>
<input type="text" name="textfield" /><br />
<textarea name="textarea"></textarea>
<script type="text/javascript">
suckerfish(sfHover, "input");
suckerfish(sfFocus, "input");
suckerfish(sfHover, "textarea");
suckerfish(sfFocus, "textarea");
</script>

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希望本文所述对大家的javascript程序设计有所帮助。

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