往遊標所在位置插入值的js程式碼_javascript技巧

複製程式碼 程式碼如下:

/* * <br>*往輸入域插入字串(遊標所在位置) <br>*@param $t document.getElementById('fieldId') <br>*@param myValue 要插入的值<br>** <br>function addSplitToField($t,myValue){ <br>if (document.selection) { <br>$t.focus(); <br>sel = document.selection.createRange(); <br>sel.text = myValue; <br>$t.focus(); <br>}else if($t.selectionStart || $t.selectionStart == '0') { <br>var startPos = $t.selectionStart; <br>var endPos = $t.selectionEnd; <br>var scrollTop = $t.scrollTop; <br>$t.value = $t.value.substring(0, startPos) myValue $t.value.substring(endPos, $ t.value.length); <br>this.focus(); <br>$t.selectionStart = startPos myValue.length; <br>$t.selectionEnd = startPos myValue.length; <br>$t.scrollTop = startPos myValue.length; <br>$t.scrollTop =$t.scrollTop = scrollTop; <br>}else{ <br>$t.value = myValue; <br>$t.focus(); <br>} <br>} <br>