function initMenu(init) {	
  this.menu0=document.getElementById('m1');
  this.menu1=document.getElementById('m2');
  this.menu2=document.getElementById('m3');
  this.menu3=document.getElementById('m4');

  switch(init){  
   case 1:
   this.menu0.style.color='#ffff99';
   break; 
   
   case 2:
   this.menu1.style.color='#ffff99';
   break; 
   
   case 3:
   this.menu2.style.color='#ffff99';
   break; 
   
   case 4:
   this.menu3.style.color='#ffff99';
   break;     
  }  
 }