<script type="text/javascript">
var currentdate= new Date();
currentdate.setDate(currentdate.getDate());
var week = ['Mon','Tue','Wed','Thu','Fri','Sat','Sun'];
var sat=new Date();
var tue=new Date();
var today=currentdate.toString();
var Day = today.substring(0,3);
for(i=0;i<week.length;i++){
    if(Day===week[i]){
        document.write('Current date : '+currentdate);
        document.write('<br/>');
                
        tue.setDate(currentdate.getDate()+(1-i));        
        document.write(' '+tue);
        document.write('<br/>');
        sat.setDate(currentdate.getDate()+(5-i));
        document.write(' '+sat);        
        
    }
}
</script>