// in-browser javascript IR system // hussein suleman // 26 october 2006 var query; var terms; var prefix; var index; var accum; var filenames; var filetitles; function dosearch (aprefix) { prefix = aprefix; // split query into terms and split out spaces query = document.forms["search"].elements["search"].value; query = query.toLowerCase (); query = query.replace (/['"_\.]/g, " "); query = query.replace (/^ +/, ""); query = query.replace (/ +$/, ""); // turn extended unicode characters into simple numbers var i; var j = query.length; var newquery = ''; for ( i=j-1; i>=0; i-- ) { var achar = query.charAt (i); if (achar.match(/[a-zA-Z0-9 ]/)) { newquery = achar+newquery; } else { newquery = '_'+query.charCodeAt (i)+'_'+newquery; } } terms = newquery.split (/ +/); // create array accum = new Array(); filenames = new Array(); filetitles = new Array(); // read term frequency files for ( var i=0; i weight[max]) max = j; if (max != i) { var swap = weight[i]; weight[i] = weight[max]; weight[max] = swap; swap = ranked[i]; ranked[i] = ranked[max]; ranked[max] = swap; } } // output results page window.name = 'mainwin'; var resultwin = window.open ('', 'searchwindow', 'width=600,height=700,resizable=yes,scrollbars=yes,status=yes'); resultwin.document.open(); resultwin.focus(); resultwin.document.write ('Search Results'); resultwin.document.write ('

Search Results

'); resultwin.document.write ('

Query: '+query+'

'); if (ranked.length > 0) { resultwin.document.write ('
    '); for ( var i=0; i'+filetitles[ranked[i]]+'
    '+filenames[ranked[i]]+''); } resultwin.document.write ('
'); } else { resultwin.document.write ('

No matching pages.

'); } resultwin.document.write (''); resultwin.document.close(); }