/**
 * Vycentruje animovany GIF doprostred obrazkovky.
 */ 
function centerLoader(elemet){  
	  //request data for centering  
	  var windowWidth = document.documentElement.clientWidth;  
	  var windowHeight = document.documentElement.clientHeight;  
	  var elementHeight = elemet.height();  
	  var elementWidth = elemet.width();  
	  //centering
	  var elementTop = 0;
	  var scrollHeight = $("body").height();
	  
	  var scrOfY = 0;
	  // zjistime, kolik ma uzivatel oscrollovano, aby se loader zobrazil do mista, kde ma odscrollovano
	  if( typeof( window.pageYOffset ) == 'number' ) {
	    //Netscape compliant
	    scrOfY = window.pageYOffset;
	  } else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
	    //DOM compliant
	    scrOfY = document.body.scrollTop;
	  } else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
	    //IE6 standards compliant mode
	    scrOfY = document.documentElement.scrollTop;
	  }
	
	  if (windowHeight > elementHeight) {
		  elementTop = (windowHeight/2) - (elementHeight/2) + scrOfY;
	  }
	
	  elemet.css({"position": "absolute", "top": elementTop, "left": windowWidth/2-elementWidth/2});	  
	  if (fullVersion == '6.0') {
	  	$("#search-loader-back").css({"height": document.body.clientHeight});  
		$("#search-loader-back").css({"width": windowWidth});  
	  }
}