<script> 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); }); } } sfFocus = function(sfEls) { for (var i=0; i<sfEls.length; i++) { sfEls[i].onfocus=function() { this.className+=" sffocus"; } sfEls[i].onblur=function() { this.className=this.className.replace(new RegExp(" sffocus\b"), ""); } } } suckerfish(sfFocus, "INPUT"); suckerfish(sfFocus, "TEXTAREA"); </script> <style type="text/css"> form{ margin: 0px auto; width: 450px; border: solid 1px #CCC; } .bo{ border-bottom: solid 1px #CCC; } label{ float: left; padding: 10px 0px 4px 30px; } input{ padding: 1px; } input,textarea{ border: 1px solid #CCC; margin: 5px 0px; } textarea{ padding: 2px; } .bt{ width: 38px; height: 20px; font-size: 11px; border: solid 1px #CCC; background: #FBFBFB; text-align: center; } .btcenter{ text-align: center; clear: left; padding: 4px 0px 0px; } .sffocus {/*----for IE----*/ background: #F0F9FB; border: 1px solid #1D95C7; } textarea:focus, input:focus {/*----for firefox......----*/ background: #F0F9FB; border: 1px solid #1D95C7; } body { font-family: Arial, Helvetica, sans-serif; font-size: 12px; color: #666666; margin-top:20px; } </style> <form action="#" method="post" name="myform" id="myform"> <div class="bo"> <label>姓名：</label> <input type="text"size="20" maxlength="10" /> </div> <div class="bo"> <label>电话：</label> <input type="text" size="20" maxlength="16" /> </div> <div class="bo"> <label>主题：</label> <input type="text" size="30" maxlength="20" /> </div> <div class="bo"> <label>内容：</label> <textarea cols="40" rows="8">