function cutStrExper( head, length )
{
   	var strLen = head.length;
	if (strLen > length)
	{
		head = head.substr(0, length+5) ;
		
		var lastIndexOfSpace = head.lastIndexOf(' ');
		
		if (lastIndexOfSpace > 0)
        {
            head = head.substr(0, lastIndexOfSpace) ;
        }
        else 
        {
            head = head.substr(0, length) ;
        }
		
		document.write(head + " ...");
		return;
	}
	else
	{
		document.write(head);		
	}		
}