<form name="myfrm" > 
<select name="sel_value" onchange="document.getElementById("sel_text").value=options[selectedIndex].text"> 
<option value="http://www.baidu.com">t1</option> 
<option value="2">t2</option> 
<option vlaue="3">t3</option> 
</select> 
<input type="hidden" id="sel_text"> 
<input type="submit"> 
</form>