当文本框获取焦点时，改变背景色，可在样式表中引用：input,textarea { behavior:url(/css/***.htc; }

<!--

/*==================================/

*与样式textBox绑定的行为文件

*

*功能：

* 实现当用户的光标定位在某输入框时，

* 该输入框显示不同的颜色的动态效果

===================================*/

-->

<public:attach event="onfocus" onevent="doFocus()"/>

<public:attach event="onblur" onevent="doBlur()"/>

<script language="jscript">

function doFocus()

{

if(element.tagName != 'INPUT' && element.tagName != 'TEXTAREA')

return false;

if(element.tagName == 'INPUT' && (element.type == "submit" || element.type == "button" ))

return false;

if(!element.readOnly)

{

element.style.backgroundColor = '#E0FFFF';

}

}

function doBlur()

{

if(element.tagName != 'INPUT' && element.tagName != 'TEXTAREA')

return false;

if(element.tagName == 'INPUT' && (element.type == "submit" || element.type == "button" ))

return false;

element.style.backgroundColor = '#FFFFFF';

}

//取cookie的内容

function getCookieVal (offset)

{

var endstr = document.cookie.indexOf (";", offset);

if (endstr == -1)

endstr = document.cookie.length;

return unescape(document.cookie.substring(offset, endstr));

}

//获取指定cookie的值

function getCookie (name)

{

var arg = name + "=";

var alen = arg.length;

var clen = document.cookie.length;

var i = 0;

while (i < clen)

{

var j = i + alen;

if (document.cookie.substring(i, j) == arg)

return getCookieVal (j);

i = document.cookie.indexOf(" ", i) + 1;

if (i == 0) break;

}

return null;

}

</script>