<input value="该文本框要输入的正确信息"
onfocus="if(this.value=='该文本框要输入的正确信息') this.value=''"
onblur="if(this.value=='')this.value='该文本框要输入的正确信息'">
onfocus="if(this.value=='该文本框要输入的正确信息') this.value=''"
onblur="if(this.value=='')this.value='该文本框要输入的正确信息'">
<div id="msg" style="width:100px;height:50px;"></div>
<SCRIPT LANGUAGE="JavaScript">
<!--
function showmsg(){
if(document.getElementById('a').value==''){
document.getElementById('msg').style.border='1px solid #f00';
document.getElementById('msg').innerHTML = '请输入数据...';
}else{
document.getElementById('msg').style.border='1px solid #00f';
document.getElementById('msg').innerHTML = '输入完毕...';
}
}
//-->
</SCRIPT>