对下面的函数进行编码的最有效的方法是什么?如果他们试图提交一个空表单并且还要清除表单以供他们进入,那么这些函数会发出警告。是否有更高效/优化的方式来编写这段jQuery?
$("#newsletter-subscribe").focus(function() {
if(this.value=='Your email address'){
this.value='';
}
});
$("#newsletter-subscribe").blur(function(){
if(this.value==''){
this.value='Your email address'
};
});
$("#subscribe").bind("submit", function(e){
email = $("input#newsletter-subscribe").val();
$("input#newsletter-subscribe").val(email);
if(jQuery.trim(email) == 'Your email address' || jQuery.trim(email) == '') {
alert('Please enter your email address to subscribe.');
return false;
}
});
这非常适合我所寻找的东西 - 谢谢! – simonyoung 2011-01-13 13:53:40