本文執行個體講述了JavaScript實現為input與textarea自訂hover,focus效果的方法。分享給大家供大家參考。具體如下:
這裡示範JavaScript為input輸入框和textarea文字框自訂hover,focus效果,hover也就是滑鼠放上去之後的效果,focus是滑鼠焦點問題,要實現 這種效果,需要JS來配合,這個例子就是很不錯的,它把網頁上輸入框和文字框都加入了滑鼠移至上方和滑鼠焦點效果。
運行效果截圖如下:
線上示範地址如下:
http://demo.jb51.net/js/2015/js-input-textarea-hover-focus-style-codes/
具體代碼如下:
<title>JavaScript為input/textarea自訂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)?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>
希望本文所述對大家的javascript程式設計有所協助。