function center_image(picheight) {
 var container = '.gallery_big';
 var parent_height =233;  
 var image_height = picheight+2;  
 var top_margin = (parent_height - image_height)/2;  
 $(container+' img').css( 'margin-top' , top_margin); 
}



function addLoadEvent(func)
{
	var oldonload = window.onload;
	if (typeof window.onload != 'function')
	{
		window.onload =function() {eval("center_image("+func+")");};
	}
	else
	{
		window.onload = function()
		{
			if (oldonload) oldonload();
			func();
		}
	}
}