function valid_search(frm)
{
	if(trim(frm.txtsearch.value).length==0)
	{
		alert("Please enter search text.");
		frm.txtsearch.focus();
		return false
	}
	return true;
}
function trim(tmp)
{
	var temp;
	temp = tmp;
	//tmp = "      this is test     ";
	pat = /^\s+/;
	temp = temp.replace(pat, "");
	pat = /\s+$/;
	temp = temp.replace(pat, "");
	//alert(":" + tmp + ":");
	return temp;
}