function checkspace(checkstr) {
  var str = '';
  for(i = 0; i < checkstr.length; i++) {
    str = str + ' ';
  }
  return (str == checkstr);
}

function checkdate(str)
{
    var r = str.match(/^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/); 
    if(r==null)return false; 
    var d= new Date(r[1], r[3]-1, r[4]); 
    return (d.getFullYear()==r[1]&&(d.getMonth()+1)==r[3]&&d.getDate()==r[4]);
}

function checknumber(str)
{
    var r = str.match(/^(\d{1,5})$/); 
    if(r==null)return true; 
}

function CheckSubmit()
{
    if(checkspace(document.AddForm.Name.value)) {
	  document.AddForm.Name.focus();
      alert("请输入报刊的名称，不能为空！");
	  return false;
    } 
    return true;
}