/* Functions for the course webpage thing. */ /* Process a click on course name s*/ function processClick(s) { triple= trim(document.theform.triple.value) quad= trim(document.theform.quad.value) if (triple == "" && quad == "") { document.location= s + "courses.html"; return } /* Looking for a course name s */ coursename= s.replace("-", " "); if (s == "SandTS") { coursename= "S&TS"; } k= getFirst(coursename); if (k == b.length) { document.theform.title.value= "course name not found: " + coursename; return } if (triple != "") { getQuad(coursename, triple, k); } else { getTriple(coursename, quad, k); } } /* = the index of the first entry in b with name s (length of b if not in) */ function getFirst(s) { for (k= 0; k != b.length; k= k+1) { el= b[k]; c= el.charAt(0); i= el.indexOf(","); if ((c < '0' || '9' < c) && 0 < i && el.substring(0, i) == s) { return k; } } return b.length; } /** Find the first entry for course-name s and 3-digit number triple and put the corresponding 4-digit number in document.theform.quad.value and its title in document.theform.title.value. If not there, put message in title. b[k] is the first entry for s. */ function getQuad(s, triple, k) { entry= b[k].substring(b[k].indexOf(',') + 1); c= entry.charAt(0); // the desired entry does not come before b[k], and entry contains b[k] without a course name // and c is the first character of entry while (k < b.length && '0' <= c && c <= '9') { i= entry.indexOf(","); if (triple == entry.substring(0, i)) { // found entry entry= entry.substring(i+1); i= entry.indexOf(","); quad= entry.substring(0, i); title= entry.substring(i+1); document.theform.quad.value= quad; document.theform.title.value= title; return; } k= k+1; if (k < b.length) { entry= b[k]; c= entry.charAt(0); } } document.theform.title.value= "Sorry. course " + s + " " + triple + " doesn't exist."; return } /** Find the first entry for course-name s and 4-digit number quad and put the corresponding 3-digit number in document.theform.trple.value and its title in document.theform.title.value. If not there, put message in title. b[k] is the first entry for s. */ function getTriple(s, quad, k) { entry= b[k].substring(b[k].indexOf(',') + 1); c= entry.charAt(0); // the desired entry does not come before b[k], and entry contains b[k] without a course name // and c is the first character of entry while (k < b.length && '0' <= c && c <= '9') { i= entry.indexOf(","); triple= entry.substring(0, i); entry= entry.substring(i+1); i= entry.indexOf(","); if (quad == entry.substring(0, i)) { title= entry.substring(i+1); document.theform.triple.value= triple; document.theform.title.value= title; return; } k= k+1; if (k