function query_item_code()
{
	var item_code = document.getElementById('item_code').value;
	alert(item_code);
	if(item_code!='' && item_code!='ÇëÊäÈëÒ©Æ·Ãû³Æ')
	{
		document.location = './url_control.php?guide_item=694&dir_item=694&content_item=731&taskid=1B5230E3EA&language=GB2&item_code='+item_code+'&temp='+Math.random();
	}
	else 
	{
		return ; 
	}
}//end function