window.onload = function() { 
var nt = new Date(); 
var hr = nt.getHours(); 
if( hr>=7 && hr<10 ) 
$("#slidechange").load("slide-mornig.html"); 
else if( hr>=10 && hr<15 )
$("#slidechange").load("slide-lunchtime.html"); 
else if( hr>=15 && hr<19 )
$("#slidechange").load("slide-happyhour.html"); 
else 
$("#slidechange").load("slide-default.html"); 
}