输入框文本输入提示 -

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输入框文本输入提示

QQ JavaScript jQuery F#XHTML

<!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">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>表单的验证</title>
<style type="text/css">
#Key{ border:1px solid #66CCFF;margin-top:30px;color:#DFDFDF;};
</style>
<link rel="shortcut icon" href="http://www.feedtrade.com.cn/favicon.ico">
<script language="javascript" src="/js/jquery-1.3.js"></script>
<script type="text/javascript">
function focusSearch()
{
 var f = document.f1; 
 if (f.Keyword.value == f.Keyword.defaultValue)
  f.Keyword.value = "";
 f.Keyword.style.color="#000";
}
function blurSearch()
{
 var f = document.f1; 
 if (f.Keyword.value == "")
  f.Keyword.value = f.Keyword.defaultValue;
 f.Keyword.style.color="#dfdfdf";
}
</script>

</head>
<body>
<form action="" method="post" id="initform" name="f1">
 <label for="user">username:</label><input type="text" name="Keyword" id="Key" value="请输入查询关键字，*号表示空值" onfocus="focusSearch();" onblur="blurSearch();"/><br />

</form>
</body>
</html>

<!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">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>表单的验证</title>
<style type="text/css">
 #user,#pw,#qq,#tel{ color:#DFDFDF;}
</style>
<script type="text/javascript">
 function validForms(){
    if(!document.getElementById) return false;
    var initform=document.getElementById("initform");
	     for(var i=0,valids=initform.elements;i<valids.length;i++){
		    if(valids[i].type=='submit') continue;
			 valids[i].onfocus=function(){
			   if(this.value==this.defaultValue){
			      this.value='';
				  this.style.color='#000';
				  
			   }
			 }
			 valids[i].onblur=function(){
			  if(this.value==''){
			    this.value=this.defaultValue;
				this.style.color='#dfdfdf';
				
				this.parentNode.onsubmit=function(){return false;}
			  }
			 
			 }
		 }
   }
 window.onload=validForms;
</script>
</head>
<body>
<form action="" method="post" id="initform">
 <label for="user">username:</label><input type="text"  id="user" value="this is abalue"/><br />
 <label for="pw">password:</label><input type="text"  id="pw" value="this is abalue"/><br />
 <label for="qq">QQ:</label><input type="text"  id="qq" value="this is abalue"/><br />
 <label for="tel">Tel:</label><input type="text"  id="tel" value="this is abalue"/><br />
  <input type="submit" value="提 交" id="sub"/>
</form>
</body>
</html>

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