function validate()
{
  if(document.getElementById('luserid').value=='')
  {
    alert('Please input user id!!!');
    document.getElementById('luserid').focus();
    return false;
  }
	
  if(document.getElementById('password').value=='')
  { 
    alert('Please input password!!!');
    document.getElementById('password').focus();
    return false;
  }
}

function checksearch()
{
  if(document.getElementById('csearch').value=='')
  {
	alert('Please input product name!!!');
	document.getElementById('csearch').focus();
    return false;
  }
}