第一个实例
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<script language="JavaScript">
<!--
function GaiBian(osel){
if(osel.options[osel.selectedIndex].text==1){alert(11);}
}
//-->
</script>
</head>
<body>
<select name='selectSS' onChange="GaiBian(this)">
<option value='1'>1 </option>
<option value='2'>2 </option>
<option value='3'>3 </option>
</select>
<select onchange="window.location.href=this.options[this.selectedIndex].value">
<option value="http:\\www.baidu.com">百度</option>
<option value="http:\\www.google.cn">谷歌</option>
</select>
</body>
</html>
第二个实例
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<script language="JavaScript">
<!--
function GaiBian(osel){
var target=document.getElementById('contentid');
if(osel.options[osel.selectedIndex].value==1){
<pre name="code" class="html"> //if(osel.options[osel.selectedIndex].text==1){
target.style.display="block"; } if (osel.options[osel.selectedIndex].value==2){target.style.display="none"; } } //--> </script> </head> <body> <select name='selectSS' onChange="GaiBian(this)"> <option value='1'>1 </option> <option value='2'>2
</option> </select> <div id="contentid" class="none">打开的内容</div> </body></html>
if(osel.options[osel.selectedIndex].value==1){