function checklogin(){
	if(loginform.loginid.value.length==0){
		alert("请输入登陆用户名！");
		loginform.loginid.focus();
		return false;
		}
	if(loginform.password.value.length==0){
		alert("请输入登陆密码！");
		loginform.password.focus();
		return false;
		}
	}
function checkinfo(){
	if((searchinfo.k.value.length==0)||(searchinfo.k.value=="请输入关键词")){
		alert("请输入搜索关键字！");
		searchinfo.k.focus();
		return false;
		}
	}
function checknews(){
	if((searchnews.searchkey.value.length==0)||(searchnews.searchkey.value=="请输入关键词")){
		alert("请输入搜索关键字！");
		searchnews.searchkey.focus();
		return false;
		}
	}
function certsearch(){
	if(certsearchform.certkey.value.length==0){
		alert("请输入搜索关键字！");
		certsearchform.certkey.focus();
		return false;
		}
	}