function check_sub(){
		if(document.search.radiobutton[1].checked){
			// 进行搜索引擎操作
			document.google.q.value = document.search.searchkeyword.value;
			document.google.submit();
		}else if (document.search.radiobutton[0].checked){
			// 本站
			document.search.title.value = document.search.searchkeyword.value;
			document.search.submit();
		}else if (document.search.radiobutton[2].checked){
			// 企业
			document.qy.qiye.value = document.search.searchkeyword.value;
			document.qy.submit();
		}else if (document.search.radiobutton[3].checked){
			// 机构
			document.jg.name1.value = document.search.searchkeyword.value;
			document.jg.submit();		
		}else if (document.search.radiobutton[4].checked){
			// 人才
			document.rc.name1.value = document.search.searchkeyword.value;
			document.rc.submit();	
		}else if (document.search.radiobutton[5].checked){
			// 法规
			document.zc.title1.value = document.search.searchkeyword.value;
			document.zc.submit();
		}else if (document.search.radiobutton[6].checked){
			// 农产品
			document.ncp.name1.value = document.search.searchkeyword.value;
			document.ncp.submit();
		}else if (document.search.radiobutton[7].checked){
			// 项目
			document.xm.xmmc.value = document.search.searchkeyword.value;
			document.xm.submit();	
		}else if (document.search.radiobutton[8].checked){
			// 成果
			document.cg.xmmc.value = document.search.searchkeyword.value;
			document.cg.submit();																			
		}	
	}