<Html><Head>
<SCRIPT LANGUAGE="JavaScript">
<!--//定义 select 原值var oldValue,oldText;//select下拉框的onkeydown事件，修改下拉框的值function catch_keydown(sel)
{
switch(event.keyCode) { case 13: //回车键 event.returnValue = false; break; case 27: //Esc键 sel.options[sel.selectedIndex].text = oldText; sel.options[sel.selectedIndex].value = oldValue; event.returnValue = false; break; case 8: //空格健 var s = sel.options[sel.selectedIndex].text; s = s.substr(0,s.length-1); if (sel.options[sel.selectedIndex].value==sel.options[sel.selectedIndex].text) { sel.options[sel.selectedIndex].value=s; sel.options[sel.selectedIndex].text=s;
} event.returnValue = false; break; } if (!event.returnValue && sel.onchange) sel.onchange(sel)}//select下拉框的onkeypress事件，修改下拉框的值function catch_press(sel){if(sel.selectedIndex>=0){ var s = sel.options[sel.selectedIndex].text + String.fromCharCode(event.keyCode); if (sel.options[sel.selectedIndex].value==sel.options[sel.selectedIndex].text) { sel.options[sel.selectedIndex].value=s; sel.options[sel.selectedIndex].text=s; } event.returnValue = false; if (!event.returnValue && sel.onchange) sel.onchange(sel) }}//select下拉框的onfocus事件，保存下拉框原来的值function catch_focus(sel) { oldText = sel.options[sel.selectedIndex].value; oldValue = sel.options[sel.selectedIndex].value;}//恢复select下拉列表当前选中的值function LoadSelect(obj,value){ for (var i=0; i< obj.options.length; i++) if (obj.options[i].value == value) { obj.selectedIndex = i; break; }}//select 选择框鼠标上移时提示选择的内容function selMouseOver(obj){ with (document.all.div_hint) { innerText = obj.options[obj.selectedIndex].text; if (innerText.length > 0) { innerText = " " + innerText + " "; style.display = "block"; style.left = event.clientX + 16; style.top = event.clientY; } }}//select 选择框鼠标移开时消失function selMouseOut(obj){ with (document.all.div_hint) { style.display = "none" }}
//--></SCRIPT></Head><Body><!--调用--><select style='width:130px;z-index:-1' name='tmpSel' onmouseover=selMouseOver(this) onmouseout=selMouseOut(this) onkeydown=catch_keydown(this) onkeypress=catch_press(this) onfocus=catch_focus(this)> <option value=''></option></select><!--提示块--><div id=div_hint style="font-size:12px;color:red;display:none;position:absolute; z-index:2; top:200;background-color: #F7F7F7; layer-background-color: #0099FF; border: 1px #9c9c9c solid;filter:Alpha(style=0,opacity=80,finishOpacity=100);"></div></Body></Html>
