JS date format Perfect validation function

JS date format Perfect validation function Validateshort (form) {
        var bvalid = true;
        var focusfield = null;
        var i = 0;
        var fields = new Array ();
 
        var oshort = eval (' new ' + jcv_retrieveformname (form) +  ' _shortvalidations () ');

        for (var x in oshort) {
             if (!jcv_verifyarrayelement (x, oshort[x]) {
                 re-enters;
           }
            var field = form[oshort[x][0]];
            if (!jcv_isfieldpresent (field)) {
              re-enters;
           }

            if (field.type = ' Hidden ' | |
                Field.type = = ' Text ' | |
                Field.type = = ' TextArea ' | |
                Field.type = = ' Select-one ' | |
                Field.type = = ' Radio ')) {

                var value = ';
               //Get field ' s Value
                if ( Field.type = = "Select-one") {
                     var si = field.selectedindex;
                     if (Si >= 0) {
                         value = Field.options[si].value;
                    }
               } else {
                     value = Field.value;
               }

                if (value.length > 0) {
                     if (!jcv_isdecimaldigits (value) {
                         bvalid = false;
                         if (i = = 0) {
                             Focusfield = field;
                        }
                         fields[i++] = oshort[x][1];

else {

var ivalue = parseint (value, 10);


if (isNaN (ivalue) | |! ( Ivalue >= -32768 && ivalue <= 32767) {


if (i = = 0) {


Focusfield = field;


}


fields[i++] = oshort[x][1];


bvalid = false;


                        }


                   }


               }


}


        }


if (fields.length > 0) {


jcv_handleerrors (fields, Focusfield);


        }


return bvalid;


    }