function checkSearch()
{
	var obj = document.forms['search'];
	var e   = obj.Keyword.value;
	if( removeBlank(e)=='' )
	{
		alert('请输入关键字');
		return false;
	}
}

function checkAdvanceSearch()
{
	var obj      = document.forms['AdvanceSearch']; 
	var Keyword  = removeBlank(obj.Keyword.value);
	var Category = obj.CategoryID.value;
	var Status   = obj.Status.value;

	if( Keyword=='' && Category==0 && Status==0 )
	{
		alert('请至少输入一个搜索条件');
		return false;		
	}

}