function showHideBlock(obj,block)
{
	if (document.getElementById(block).style.display =="none")
	{
	   document.getElementById(block).style.display = 'block';
       document.getElementById(obj).src = '/heart/images/sjian.gif';
	}
	else
	{
       document.getElementById(block).style.display = 'none';
       document.getElementById(obj).src = '/heart/images/sjia.gif';
	}
}