我正在尝试添加一个具有自动完成功能的字段，为此我使用了 javascript
<link rel="stylesheet" href="http://code.jquery.com/ui/1.9.0/themes/base/jquery-ui.css " />
<script src="http://code.jquery.com/jquery-1.8.2.js "></script>
<script src="http://code.jquery.com/ui/1.9.0/jquery-ui.js "></script>
<script>
$(function() {
var availableTags = [
"ActionScript",
"AppleScript",
"Asp",
"BASIC",
"C",
"C++",
"Clojure",
"COBOL",
"ColdFusion",
"Erlang",
"Fortran",
"Groovy",
"Haskell",
"Java",
"JavaScript",
"Lisp",
"Perl",
"PHP",
"Python",
"Ruby",
"Scala",
"Scheme"
];
function split( val ) {
//document.write(val.length);
return val.split( /,\s*/ );
}
function extractLast( term ) {
//echo (term.length);
//document.write(term.length);
return split( term ).pop();
}
$( "#Tag_tag_name" )
// don't navigate away from the field on tab when selecting an item
.bind( "keydown", function( event ) {
var a=0;
// if (event.keyCode === $.ui.keyCode.TAB)
// {
// a=a+1;
// }
if ( event.keyCode === $.ui.keyCode.TAB &&
$( this ).data( "autocomplete" ).menu.active ) {
event.preventDefault();
}
// if (event.keyCode === $.ui.keyCode.P)
// {
// alert(a);
// }
})
.autocomplete({
minLength: 0,
source: function( request, response ) {
// delegate back to autocomplete, but extract the last term
response( $.ui.autocomplete.filter(
availableTags, extractLast( request.term ) ) );
},
focus: function() {
// prevent value inserted on focus
return false;
},
select: function( event, ui ) {
var terms = split( this.value );
// remove the current input
terms.pop();
// add the selected item
terms.push( ui.item.value );
// add placeholder to get the comma-and-space at the end
terms.push( "" );
this.value = terms.join( ", " );
return false;
}
});
});
</script>
现在我想做的是代替 AvaialbleTags 变量中的这个静态值，我想要来自数据库的值？另外，我想限制用户添加的三个值。
谁能帮我这个 ？