去掉JS数组中重复的元素

<SCRIPT LANGUAGE="JavaScript">
<!--
//（2）将所有相同的option内容去掉
function test(){
var array=["1","2","2","3","cc","cc"];
var data={};
var desiredArr=new Array();
for(var i=0;i<array.length;i++){
data[array[i]]=array[i];
}

for(var pro in data){
desiredArr.push(data[pro]);
}

for(var tt in desiredArr){
alert(desiredArr[tt]);
}
}
test();
//-->
</SCRIPT>