function search4()
{
if(form1.abc0.checked)
   window.open("http://search.sina.com.cn/cgi-bin/search/search.cgi?_searchkey="+form1.key.value,"mspg0");
if(form1.abc2.checked)
   window.open("http://cn.search.yahoo.com/search/cn?p="+form1.key.value,"mspg2");
if(form1.abc4.checked)
   window.open("http://www.google.com/search?hl=zh-CN&lr=lang_zh-CN&q="+form1.key.value,"mspg4");
if(form1.abc6.checked)
   window.open("http://www1.baidu.com/baidu?tn=sitehao123&word="+form1.key.value,"mspg6");
return false;   
}