Normalde sekme tuşu bir sonraki odaklanılabilir şeye hareket eder. Bu, bunun yerine bir sekme karakteri ekler.
HTMLTextAreaElement.prototype.getCaretPosition = function () ( //return the caret position of the textarea return this.selectionStart; ); HTMLTextAreaElement.prototype.setCaretPosition = function (position) ( //change the caret position of the textarea this.selectionStart = position; this.selectionEnd = position; this.focus(); ); HTMLTextAreaElement.prototype.hasSelection = function () ( //if the textarea has selection then return true if (this.selectionStart == this.selectionEnd) ( return false; ) else ( return true; ) ); HTMLTextAreaElement.prototype.getSelectedText = function () ( //return the selection text return this.value.substring(this.selectionStart, this.selectionEnd); ); HTMLTextAreaElement.prototype.setSelection = function (start, end) ( //change the selection area of the textarea this.selectionStart = start; this.selectionEnd = end; this.focus(); ); var textarea = document.getElementsByTagName('textarea')(0); textarea.onkeydown = function(event) ( //support tab on textarea if (event.keyCode == 9) ( //tab was pressed var newCaretPosition; newCaretPosition = textarea.getCaretPosition() + " ".length; textarea.value = textarea.value.substring(0, textarea.getCaretPosition()) + " " + textarea.value.substring(textarea.getCaretPosition(), textarea.value.length); textarea.setCaretPosition(newCaretPosition); return false; ) if(event.keyCode == 8)( //backspace if (textarea.value.substring(textarea.getCaretPosition() - 4, textarea.getCaretPosition()) == " ") ( //it's a tab space var newCaretPosition; newCaretPosition = textarea.getCaretPosition() - 3; textarea.value = textarea.value.substring(0, textarea.getCaretPosition() - 3) + textarea.value.substring(textarea.getCaretPosition(), textarea.value.length); textarea.setCaretPosition(newCaretPosition); ) ) if(event.keyCode == 37)( //left arrow var newCaretPosition; if (textarea.value.substring(textarea.getCaretPosition() - 4, textarea.getCaretPosition()) == " ") ( //it's a tab space newCaretPosition = textarea.getCaretPosition() - 3; textarea.setCaretPosition(newCaretPosition); ) ) if(event.keyCode == 39)( //right arrow var newCaretPosition; if (textarea.value.substring(textarea.getCaretPosition() + 4, textarea.getCaretPosition()) == " ") ( //it's a tab space newCaretPosition = textarea.getCaretPosition() + 3; textarea.setCaretPosition(newCaretPosition); ) ) )