有焦点时文字消失。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8"/>
<title>请输入关键字查询 - 豪情</title>
</head>
<body>
<input type="text" name="" id="txt1" value="请输入关键字查询" />
<script type="text/javascript">
var oTxt = document.getElementById('txt1');
var bWrite = true;
oTxt.onfocus = function(){
if(bWrite){
this.value = '';
bWrite = false;
}
}
oTxt.onblur = function(){
if(this.value == ''){
this.value = this.defaultValue;
bWrite = true;
}
}
</script>
</body>
</html>
运行代码-文字消失版
有焦点时文字变淡。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8"/>
<title>请输入关键字查询加强版 - 豪情</title>
<style type="text/css">
*{ margin:0; padding:0;}
body{font:12px/1.5 arial;background: #fff;}
.username{ position:relative;margin:30px auto; width:500px;}
.default{ position:absolute;top:10px;left:2px;padding:0 8px; z-index:1; color:#8B9096;cursor:text;}
.txt{ position:relative; height:35px; padding:0 6px;border-radius:5px; line-height:35px;background: #fff; border:1px solid #9DADC5;}
</style>
</head>
<body>
<div class="username">
<label class="default" id="default" for="txt1">请输入关键字查询</label>
<input type="text" name="" id="txt1" class="txt" value="" />
</div>
<script type="text/javascript">
var oTxt = document.getElementById('txt1');
var oDefault = document.getElementById('default');
var sOld = oDefault.innerHTML;
oTxt.onfocus = function(){
oDefault.style.color = '#ccc';
}
oTxt.onblur = function(){
oDefault.style.color = '#8B9096';
}
oTxt.onpropertychange = oTxt.oninput = toChange;
oTxt.value.length > 0 && (oDefault.innerHTML = '');
function toChange(){
if(oTxt.value.length > 0){
oDefault.innerHTML = '';
} else {
oDefault.innerHTML = sOld;
bWrite = false;
}
}
</script>
</body>
</html>
运行代码-文字变灰版
