function lazyloadimg(option)
{
	var settings={defObj:null,defHeight:0};
    settings=$.extend(settings,option||{});
    var defHeight=settings.defHeight,defObj=(typeof settings.defObj=="object")?settings.defObj.find("img"):$(settings.defObj).find("img");
    var pageTop=function()
    {
    	return document.documentElement.clientHeight+Math.max(document.documentElement.scrollTop,document.body.scrollTop)-settings.defHeight;
    };
    var imgLoad=function()
    {
    	defObj.each(function()
    	{ 
    		
    		if($(this).offset().top<=pageTop())
    		{
    			var src2=$(this).attr("src2");
                if(src2)
                {
                	$(this).attr("src",src2).removeAttr("src2");
                }
            }
         });
    };
    imgLoad();
    $(window).bind("scroll",function()
    {            
    	imgLoad();
    });
}