$(document).ready(function(){
						   
	/*$('li#displayswimmingpoolsub').hover(
		function() { $('ul', this).slideDown(); },
		function() { $('ul', this).hide(); });*/
	
	$('li#navheatexchangers').click(function () {
     	$('div#dlheatexchangers').css("display","block");
     	$('div#dloilcoolers').css("display","none");
     	$('div#dlqualitydocuments').css("display","none");
     	$('li#navheatexchangers').addClass("on");
     	$('li#navoilcoolers').removeClass("on");;
     	$('li#navqualitydocuments').removeClass("on");
    });
	
	$('li#navoilcoolers').click(function () {
     	$('div#dlheatexchangers').css("display","none");
     	$('div#dloilcoolers').css("display","block");
     	$('div#dlqualitydocuments').css("display","none");
     	$('li#navheatexchangers').removeClass("on");
     	$('li#navoilcoolers').addClass("on");;
     	$('li#navqualitydocuments').removeClass("on");
    });
	
	$('li#navqualitydocuments').click(function () {
     	$('div#dlheatexchangers').css("display","none");
     	$('div#dloilcoolers').css("display","none");
     	$('div#dlqualitydocuments').css("display","block");
     	$('li#navheatexchangers').removeClass("on");
     	$('li#navoilcoolers').removeClass("on");;
     	$('li#navqualitydocuments').addClass("on");
    });

	
});