文本框输入提示

<input οnkeyup="showtips()" id=txt οnkeydοwn='enterTips()'>(eg. ShanDong)<br>

<select id=sel style='display:none' multiple οnkeydοwn='if(event.keyCode==13)txt.value=value,sel.style.display="none",txt.focus()'></select>

<script>

function showtips(){

if(sel.value!=txt.value){

var msg = new Array("Beijing","Tianjing","Shanghai","Guangdong","ShanDong","Shanxi","Hunan","Hubei");

sel.style.display='';

sel.length=0;

var len=msg.length;

var re=new RegExp("^"+event.srcElement.value,"i")

for(i=0;i<len;i++) if(re.test(msg[i])==true) sel.add(new Option(msg[i],msg[i])),sel[0].selected=true;

}

}

function enterTips(){

e=event.keyCode;

if(e==13) event.srcElement.value=sel.value,sel.style.display='none';

if(e==40) sel.focus();

}

document.οnclick=function(){sel.style.display='none';txt.focus()}

</script>