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94 lines
2.9 KiB
JavaScript
94 lines
2.9 KiB
JavaScript
5 years ago
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//CdnPath=http://ajax.aspnetcdn.com/ajax/4.5.1/1/WebForms.js
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function WebForm_FindFirstFocusableChild(control) {
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if (!control || !(control.tagName)) {
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return null;
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}
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var tagName = control.tagName.toLowerCase();
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if (tagName == "undefined") {
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return null;
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}
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var children = control.childNodes;
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if (children) {
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for (var i = 0; i < children.length; i++) {
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try {
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if (WebForm_CanFocus(children[i])) {
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return children[i];
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}
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else {
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var focused = WebForm_FindFirstFocusableChild(children[i]);
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if (WebForm_CanFocus(focused)) {
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return focused;
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}
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}
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} catch (e) {
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}
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}
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}
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return null;
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}
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function WebForm_AutoFocus(focusId) {
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var targetControl;
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if (__nonMSDOMBrowser) {
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targetControl = document.getElementById(focusId);
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}
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else {
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targetControl = document.all[focusId];
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}
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var focused = targetControl;
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if (targetControl && (!WebForm_CanFocus(targetControl)) ) {
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focused = WebForm_FindFirstFocusableChild(targetControl);
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}
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if (focused) {
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try {
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focused.focus();
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if (__nonMSDOMBrowser) {
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focused.scrollIntoView(false);
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}
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if (window.__smartNav) {
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window.__smartNav.ae = focused.id;
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}
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}
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catch (e) {
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}
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}
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}
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function WebForm_CanFocus(element) {
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if (!element || !(element.tagName)) return false;
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var tagName = element.tagName.toLowerCase();
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return (!(element.disabled) &&
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(!(element.type) || element.type.toLowerCase() != "hidden") &&
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WebForm_IsFocusableTag(tagName) &&
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WebForm_IsInVisibleContainer(element)
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);
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}
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function WebForm_IsFocusableTag(tagName) {
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return (tagName == "input" ||
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tagName == "textarea" ||
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tagName == "select" ||
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tagName == "button" ||
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tagName == "a");
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}
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function WebForm_IsInVisibleContainer(ctrl) {
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var current = ctrl;
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while((typeof(current) != "undefined") && (current != null)) {
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if (current.disabled ||
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( typeof(current.style) != "undefined" &&
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( ( typeof(current.style.display) != "undefined" &&
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current.style.display == "none") ||
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( typeof(current.style.visibility) != "undefined" &&
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current.style.visibility == "hidden") ) ) ) {
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return false;
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}
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if (typeof(current.parentNode) != "undefined" &&
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current.parentNode != null &&
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current.parentNode != current &&
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current.parentNode.tagName.toLowerCase() != "body") {
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current = current.parentNode;
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}
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else {
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return true;
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}
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}
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return true;
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}
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