Javascript实现获取及设置光标位置的方法

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获取光标位置函数:

function getCursortPosition (ctrl) {var CaretPos = 0; // IE Supportif (document.selection) {ctrl.focus ();var Sel = document.selection.createRange ();Sel.moveStart ('character', -ctrl.value.length);CaretPos = Sel.text.length;}// Firefox supportelse if (ctrl.selectionStart || ctrl.selectionStart == '0')CaretPos = ctrl.selectionStart;return (CaretPos);}

设置光标位置函数：

function setCaretPosition(ctrl, pos){if(ctrl.setSelectionRange){ctrl.focus();ctrl.setSelectionRange(pos,pos);}else if (ctrl.createTextRange) {var range = ctrl.createTextRange();range.collapse(true);range.moveEnd('character', pos);range.moveStart('character', pos);range.select();}}

参考：

/jiqing9006/p/6510114.html

/article/69780.htm

/article/45420.htm