onChange="if( options[selectedIndex].value!='')window.location='index.jsp?BM='options[selectedIndex].value''"?

Question

<select size="1" name="BM" onChange="if( options[selectedIndex].value!='') {window.location.herf='index.jsp?BM='"+options[selectedIndex].value+"''} ">

Answer 1

<select size="1" name="BM" onChange="if( options[selectedIndex].value!='')window.location='index.jsp?BM=' + options[selectedIndex].value;" >
最好还是定义一个函数吧：<select size="1" name="BM" onchange="test();"><script>
function test()
{
if( document.all["BM"].value!='')
window.location='index.jsp?BM=' + document.all["BM"].value;
}</script>

Answer 2

<select size="1" name="BM" onChange="if( options[selectedIndex].value!='') {window.location.herf='index.jsp?BM='+options[selectedIndex].value+'';} ">这样就ok 了!!!

Answer 3

<select size="1" name="BM" onChange="if( options[selectedIndex].value!='')window.location='index.jsp?BM=options[selectedIndex].value' ">
<option>aa<option value="aa">aa<option>aa
</select>

Answer 4

照flyshp(天堂雨)做就可以了。