https://sweettomatoespizzatruck.com/stpt-pb.js

1
2//
3// stpt-pb.js  130619
4
5// timer code
6// from http://www.w3schools.com/js/tryit.asp?filename=tryjs_timing_infinite
7
8var t;
9
10function start_timer()
11{
12//alert("in start_timer()");
13timedCount();
14}
15
16function timedCount()
17{
18pb_dsp();
19//alert("in timedCount()");
20t=setTimeout("timedCount()",10000);
21}
22
23//
24// Photo Board code
25// 
26
27var pb_img0; // current photo board image set index position
28
29//
30// initialization
31//
32
33function init_0()
34{
35init(); 
36pb_img0=Math.floor(Math.random()*pb_set); //alert("pb_img0= "+pb_img0);
37timedCount();
38}
39
40
41// build image set for photo board
42
43var pb_str,pb_size=7,pb_set=17,rchars="",i,pbi;
44
45
46function pb_dsp()
47{
48pb_str=bld_imgstr(pb_set); //alert("in pb_dsp(), pb_str= "+pb_str);
49//alert("pb_dsp(); pb_str= "+pb_str);
50// randomize string
51for(i=0;i<pb_size; ++i)
52  {
53  pbi=pb_str.substr(2*i,2); //alert("pb_str, i, pbi= "+pb_str+", "+i+", "+pbi);
54  document.getElementById("pb0"+(i+1).toString()).src="images/stpt-pb"+pbi+".jpg";
55  }
56}
57
58
59function bld_imgstr(pbnum)
60{
61var i,str,str_r;
62str=bld_str1D(pb_img0,pb_size,pb_set); pb_img0=(pb_img0+pb_size-1)%pb_set+1;
63str_r=str_rndmz(str);
64return str_r;
65}
66
67function str_rndmz(str)
68{
69var i,len0=str.length,len,rpos,rchr,str0=str,str1,str2,str_r="";
70
71for(i=1;i<=len0;++i)
72{
73  len=str0.length/2; //Math.floor(str0.length/2);
74  rpos=Math.floor(Math.random()*len)+1;
75  str1=str0.substr(0,2*(rpos-1));
76  rchr=str0.substr(2*(rpos-1),2);
77  str2=str0.substr(2*(rpos-1)+2,2*len-2*(rpos-1)-2);
78  //alert("in str_rndmz(); str0, rchr, str1, str2, str_r= "+str0+", "+rchr+", "+str1+", "+str2+", "+str_r);
79  str0=str1+str2; 
80  str_r=str_r+rchr; 
81}
82//alert("in str_rndmz(); str, str_r= "+str+", "+str_r);
83return str_r;
84
85}
86
87
88//
89//  bld_str1D0(n) returns an ordered string of (n) 2 digit numbers ranging from (n) to (n+len), modulo 'modbase'
90//  i.e.: "0304...09100102... (n+len%modbase)" which are accessable
91//  as str.substr(2*(len-1),2). This string will be used to randomly select sets of images.
92//
93function bld_str1D(n,len,modbase)
94{
95var i,str0,str;
96str="";
97for(i=n;i<n+len;i++)
98  {
99  m=i%modbase+1; //alert("bld_imgstr1(); m= "+m);
100  str0=m.toString();
101  if(str0.length==1){str0="0"+str0;}
102  str=str+str0;
103  }
104return str;
105}
106
107// end of stpt_pb.js