Bad.js for @brittanystoroz, circa 2007

gistfile1.txt

function fixDate(fieldname,datestr) {
        //Make lowercase
        newdatestr = datestr.toLowerCase();
        //trim first
        newdatestr = newdatestr.replace(/^\s+|\s+$/g,'');

        //If it was just whitespace, don't run the function
        if (!newdatestr.length) {
                return;
        }
        //replace month names and abbreviations first
        newdatestr = newdatestr.replace('january','1');
        newdatestr = newdatestr.replace('jan','1');
        newdatestr = newdatestr.replace('jan.','1');
        newdatestr = newdatestr.replace('february','2');
        newdatestr = newdatestr.replace('feb','2');
        newdatestr = newdatestr.replace('feb.','2');
        newdatestr = newdatestr.replace('march','3');
        newdatestr = newdatestr.replace('mar','3');
        newdatestr = newdatestr.replace('mar.','3');
        newdatestr = newdatestr.replace('april','4');
        newdatestr = newdatestr.replace('apr','4');
        newdatestr = newdatestr.replace('apr.','4');
        newdatestr = newdatestr.replace('may','5');
        newdatestr = newdatestr.replace('may.','5');
        newdatestr = newdatestr.replace('june','6');
        newdatestr = newdatestr.replace('jun','6');
        newdatestr = newdatestr.replace('jun.','6');
        newdatestr = newdatestr.replace('july','7');
        newdatestr = newdatestr.replace('jul','7');
        newdatestr = newdatestr.replace('jul.','7');
        newdatestr = newdatestr.replace('august','8');
        newdatestr = newdatestr.replace('aug','8');
        newdatestr = newdatestr.replace('aug.','8');
        newdatestr = newdatestr.replace('september','9');
        newdatestr = newdatestr.replace('sept.','9');
        newdatestr = newdatestr.replace('sept','9');
        newdatestr = newdatestr.replace('sep.','9');
        newdatestr = newdatestr.replace('sep','9');
        newdatestr = newdatestr.replace('october','10');
        newdatestr = newdatestr.replace('oct','10');
        newdatestr = newdatestr.replace('oct.','10');
        newdatestr = newdatestr.replace('november','11');
        newdatestr = newdatestr.replace('nov.','11');
        newdatestr = newdatestr.replace('nov','11');
        newdatestr = newdatestr.replace('december','12');
        newdatestr = newdatestr.replace('dec','12');
        newdatestr = newdatestr.replace('dec.','12');
        //replace slashes, periods, dashes, spaces, commas with slashes
        newdatestr = newdatestr.replace(/[.]/g,'/');
        newdatestr = newdatestr.replace(/[-]/g,'/');
        newdatestr = newdatestr.replace(/[,]/g,'/');
        newdatestr = newdatestr.replace(/\s/g,'/');
        //if there are any non numeric, non slash characters now, exit the function
        //FILL IN
        //remove double,triple slashes
        newdatestr = newdatestr.replace('///////','/');
        newdatestr = newdatestr.replace('/////','/');
        newdatestr = newdatestr.replace('////','/');
        newdatestr = newdatestr.replace('///','/');
        newdatestr = newdatestr.replace('//','/');
        //remove leading zero from each
        componentsplit = newdatestr.split('/');
        for (i = 0; i < componentsplit.length - 1; i++) {
                while (componentsplit[i].substr(0,1) == '0') {
                        componentsplit[i] = componentsplit[i].substr(1,9999);
                }
        }
        //if the year is two digits and is after 2010, preface with 19, otherwise preface with 20
        if (componentsplit[componentsplit.length-1].length == 2) {
                if (parseInt(componentsplit[componentsplit.length-1]) > 10) {
                        componentsplit[componentsplit.length-1] = '19'+componentsplit[componentsplit.length-1];
                } else {
                        componentsplit[componentsplit.length-1] = '20'+componentsplit[componentsplit.length-1];
                }
        }
        newdatestr = componentsplit.join('/');
        //should be either a four digit year, a one-two digit month + / + four digit year, or a one-two digit month + / + 1-2 digit day + / + four digit year
        if (/^([0-9]{1,2}\/){0,2}[0-9]{4}$/.test(newdatestr)) {
                document.getElementById(fieldname).value = newdatestr;
        }
        return;
}