jQuery input placeholder
HTML
<input id="email" name="email" type="text" value="Write your email here" />
JavaScript
$('#email')
.on('focus', function(){
var $this = $(this);
if($this.val() == 'Write your email here'){
$this.val('');
}
})
.on('blur', function(){
var $this = $(this);
if($this.val() == ''){
$this.val('Write your email here');
}
});