Input鼠标经过变色(支持textarea) Js版

Html

<form action="#" method="post" name="myform" id="myform">
<div class="bo"><label for="name">姓名：</label>
<input type="text"size="20" name="name" id="name" maxlength="10" /></div>
<div class="bo"><label for="tel">电话：</label>
<input type="text" size="20" name="tel" id="tel" maxlength="16" /></div>
<div class="bo"><label for="mo">主题：</label>
<input type="text" size="30" name="mo" id="mo" maxlength="20" /></div>
<div class="bo"><label for="con">内容：</label>
<textarea cols="40" rows="8" name="con" id="con">
</textarea>
</form>

JS

<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+=" sfhover";
}
sfEls[i].onmouseout=function() {
this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
}
}
}
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"), "");
}
}
}
sfActive = function(sfEls) {
for (var i=0; i<sfEls.length; i++) {
sfEls[i].onmousedown=function() {
this.className+=" sfactive";
}
sfEls[i].onmouseup=function() {
this.className=this.className.replace(new RegExp(" sfactive\\b"), "");
}
}
}
sfTarget = function(sfEls) {
var aEls = document.getElementsByTagName("A");
document.lastTarget = null;
for (var i=0; i<sfEls.length; i++) {
if (sfEls[i].id) {
if (location.hash==("#" + sfEls[i].id)) {
sfEls[i].className+=" sftarget";
document.lastTarget=sfEls[i];
}
for (var j=0; j<aEls.length; j++) {
if (aEls[j].hash==("#" + sfEls[i].id)) aEls[j].targetEl = sfEls[i];
aEls[j].onclick = function() {
if (document.lastTarget) document.lastTarget.className = document.lastTarget.className.replace(new RegExp(" sftarget\\b"), "");
if (this.targetEl) this.targetEl.className+=" sftarget";
document.lastTarget=this.targetEl;
return true;
}
}
}
}
}
suckerfish(sfHover, "p");
suckerfish(sfActive, "p");
suckerfish(sfHover, "INPUT");
suckerfish(sfActive, "TEXTAREA");
suckerfish(sfFocus, "INPUT");
suckerfish(sfFocus, "TEXTAREA");
suckerfish(sfTarget, "H5");
suckerfish(sfHover, "pre");
suckerfish(sfActive, "pre");
</script>

css

.sffocus {background: #F0F9FB; /*----for IE----*/border: 1px solid #1D95C7;}
textarea:focus, input:focus {background: #F0F9FB; /*----for firefox......----*/border: 1px solid #1D95C7;}