function ValidLargeLength(item,len){
 return(item.length>=len);
 }

function ValidLessLength(item,len){
 return(item.length<=len);
 }

function ValidNewsVolumn(){
	errfound=false;
	vname = document.form1.vol_name;

	if(!(ValidLargeLength(vname.value,1) && ValidLessLength(vname.value,50))){
		error("请输入新闻栏目的标题！");
		vname.focus();
	}
  return !errfound;
}

function ValidNewsSubject(){
	errfound=false;
	sname = document.form1.sub_name;

	if(!(ValidLargeLength(sname.value,1) && ValidLessLength(sname.value,50))){
		error("请输入新闻专题的标题！");
		sname.focus();
	}
  return !errfound;
}

function ValidNews(){
	errfound = false;
	title = document.form1.title;

	if(!(ValidLargeLength(title.value,1) && ValidLessLength(title.value,100))){
		error("请输入新闻标题！");
		title.focus();
	}
  return !errfound;
}

function ValidSearchString(){
	errfound = false;
	searchstring = document.form1.searchstring;

	if(!(ValidLargeLength(searchstring .value,1) && ValidLessLength(searchstring.value,20))){
		error("请输入新闻搜索关键字！");
		searchstring.focus();
	}
  return !errfound;
}

function error(text){
	if(errfound) return;
	window.alert(text);
	errfound=true;
}

function openwindow(url){
	win = window.open(url,null,"height=500,width=700,top=100,left=100,resiable=yes,scrollbars=yes,status=no,toolbar=no,menubar=no,location=no");
	win.focus();
	return false;
}