A.var $userName=$("input:text");
var $userNameValue=$userName.text();
$userName.blur(function(){
if($userNameValue=="请输E-mail"){
$userName.text("");
$(this).css("border","1px solid green").next().html("请输入您的E-mail地址");
return false;
}
})
B.var $userName=$(":text");
var $userNameValue=$userName.val();
$userName. blur(function(){
if($userNameValue=="请输E-mail"){
$userName.val();
$(this).css("border","1px solid green").after().text("请输入您的E-mail地址");
return false;
}
})
C.var $userName=$("[name=userName]");
var $userNameValue=$userName.val();
$userName.focus(function(){
if($userNameValue=="请输E-mail"){
$userName.val("");
$(this).css("border","1px solid green");
$(".tips").text("请输入您的E-mail地址");
return false;
}
})
D.var $userName=$("input[name=userName]");
var $userNameValue=$userName.val();
$userName.focus(function(){
if($userNameValue=="请输E-mail"){
$userName.val("");
$(this).css("border","1px solid green").next().text("请输入您的E-mail地址");
return false;
}
})