var focus_changing = false; var dont_check = false; // Focus into field f, display message s and return false function focus_alert(s, f) { f.focus(); alert(s); return false; } // Check fields in the form // s is warning message, f is pointer to
, next arguments are names of mandatory fields // example of use: function form_correct(s, f) { // correctness of each field for (i=0; i < f.elements.length; i++) { if (f.elements[i].onblur != undefined && !f.elements[i].onblur()) { return false; } } // non-emptiness of selected fields for (i=2; i < arguments.length; i++) { if (f[arguments[i]].value == '') { return focus_alert(s, f[arguments[i]]); } } return true; } // Check if field matches ereg // example of use: function ereg_correct(s, f, regexp) { if (f.value == '' || regexp.test(f.value)) { return true; } if (!focus_changing) { focus_changing = true; focus_alert(s, f); focus_changing = false; } return false; } // Check if there is a number in the field // s is warning message, f is input field, boolean negative allows negative values, d1 is number of digits before decimal point, optional d2 is maximum count of digits after decimal point (empty - none, d1 - unlimited) // example of use: function number_correct(s, f, negative, d1, d2) { f.value = f.value.replace(',', '.'); return ereg_correct(s, f, new RegExp('^'+ (negative ? '-?' : '') +'[0-9]{0,'+ (d1 ? d1 : '') +'}'+ (d2 ? '([.][0-9]{1,'+ d2 +'})?' : '') +'$')); } // Check if there is an e-mail in the field, simplified! // example of use: function email_correct(s, f) { return ereg_correct(s, f, /^[^ @]+@[^ @]+\.[^ @]+$/); } // Check if there is a URL in the field, simplified! // example of use: function url_correct(s, f) { return ereg_correct(s, f, /^https?:\/\/[^ \/]+\.[^ ]+/); } // Open image window function img_open(filename, w, h, title) { with (window.open('', '', (w && h ? 'width=' + w + ', height=' + h : 'width=100, height=100'))) { document.write('\n\n'); if (title) { document.write('\n' + title + '\n\n'); } document.write('\n\n\n'); document.write(''); document.write(''); document.write('\n'); document.write('\n\n\n'); return true; } return false; } //// JF function menu_onoff(item) { with (document.getElementById(item).style) { display = (display == "none" ? "block" : "none"); return true; } return false; }