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急 select中逗留鼠标提示信息

热度:7935   发布时间:2013-02-25 21:15:51
急!!! select中停留鼠标提示信息
jsp页面

下拉列选select中鼠标停留 显示提示信息为item值

------解决方案--------------------------------------------------------
HTML code
<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=''>aaa</option> <option value=''>bbb</option> <option value=''>ccc</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>
------解决方案--------------------------------------------------------
<select name="test" style="width:111px" >
<option>这是个很长很长的text</option>
<option>这是个很长很长的text</option>
<option>这是个很长很长的text</option>
</select>
<script>
var options=document.getElementsByTagName("option");
for(var i=0;i<options.length;i++)options[i].title=options[i].innerHTML;
</script>

firefox 里面肯定好使 IE不确定
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