以下代码加入web form不好用,单独放在外面就好用,如何解决

Question

<form name="formjc" method="post" action="" onsubmit="return(search4())">
<script language=javascript>

function search4()
{
if(formjc.abc0.checked)
window.open("http://search.sina.com.cn/cgi-bin/search/search.cgi?_searchkey="+formjc.key.value,"");
if(formjc.abc1.checked)
window.open("http://site.search.sohu.com/sitesearch.jsp?page_index=0&key_word="+formjc.key.value,"");
if(formjc.abc2.checked)
window.open("http://cn.search.yahoo.com/search/cn?p="+formjc.key.value,"");
if(formjc.abc3.checked)
window.open("http://nisearch.163.com/Search?q="+formjc.key.value,"");
if(formjc.abc4.checked)
window.open("http://www.google.com/search?hl=zh-CN&lr=lang_zh-CN&q="+formjc.key.value,"");
if(formjc.abc5.checked)
window.open("http://cns.3721.com/cns.dll?name="+formjc.key.value,"");
if(formjc.abc6.checked)
window.open("http://www.baidu.com/baidu?tn=siteskyhits&word="+formjc.key.value,"");
return false;   
}

</script> <table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td height="22">
请输入关键字:</td>
</tr>
<tr>
<td height="30">
<input type="text" name="key" size="8" style="WIDTH: 80px; HEIGHT: 22px"> <input type="submit" value="搜索" name="B1">
</td>
</tr>
<tr>
<td>
<input type="checkbox" name="abc0" value="sina"> 新浪 <input type="checkbox" name="abc1" value="sohu">
搜狐<BR>
<input type="checkbox" name="abc2" value="yahoo"> 雅虎 <input type="checkbox" name="abc3" value="yeah">
网易<BR>
<input type="checkbox" name="abc4" value="google"> google <input type="checkbox" name="abc5" value="3721">
3721<BR>
<input type="checkbox" name="abc6" value="google" checked> 百度&nbsp;
</td>
</tr>
<tr>
<td height="60" valign="bottom"><IMG alt="" src="images/link.JPG">
</td>
</tr>
</table>
</form>