var num = 6;

 var llink = new Array();
 var leftmenulinks = new Array();

 llink[0]="<a href='http://www.BahamasSecurity.com/software/geovision/'>GeoVision Software</a>";
 llink[1]="<a href='http://www.BahamasSecurity.com/software/utilities/'>Software & Utilities</a>";
 llink[2]="<a href='http://www.BahamasSecurity.com/software/vb6/'>Visual Basic 6.0 Code</a>";
 llink[3]="<a href='http://www.BahamasSecurity.com/contact.asp'><font color='#cc0000'>Advertise here</font></a>";
 llink[4]="<a href='http://www.BahamasSecurity.com/software/vbscripts/'>Visual Basic Scripts</a>";
 llink[5]="<a href='http://www.BahamasSecurity.com/software/tipsandtricks/'>Tips & Tricks</a>";
 
 leftmenulinks[0]=llink[0]+'<br>'+llink[1]+'<br>'+llink[2]+'<br>'+llink[3]+'<br>'+llink[4]+'<br>'+llink[5]+'<br>';
 leftmenulinks[1]=llink[0]+'<br>'+llink[1]+'<br>'+llink[3]+'<br>'+llink[2]+'<br>'+llink[4]+'<br>'+llink[5]+'<br>';
 leftmenulinks[2]=llink[0]+'<br>'+llink[3]+'<br>'+llink[1]+'<br>'+llink[2]+'<br>'+llink[4]+'<br>'+llink[5]+'<br>';
 leftmenulinks[3]=llink[3]+'<br>'+llink[0]+'<br>'+llink[1]+'<br>'+llink[2]+'<br>'+llink[4]+'<br>'+llink[5]+'<br>';
 leftmenulinks[4]=llink[0]+'<br>'+llink[1]+'<br>'+llink[2]+'<br>'+llink[4]+'<br>'+llink[5]+'<br>'+llink[3]+'<br>';
 leftmenulinks[5]=llink[0]+'<br>'+llink[1]+'<br>'+llink[2]+'<br>'+llink[4]+'<br>'+llink[3]+'<br>'+llink[5]+'<br>';

 var adnum=Math.round(Math.random()*num)-1;
 while(adnum<0 || adnum>num) adnum=Math.round(Math.random()*num)-1;

 document.write(leftmenulinks[adnum])