JS获取textArea中光标位置的方法

function getCursorPos(pTextArea) {  var cursurPosition=-1;  if(pTextArea.selectionStart){//非IE浏览器        cursurPosition= pTextArea.selectionStart;    }else{//IE        var range = document.selection.createRange();        range.moveStart("character",-pTextArea.value.length);        cursurPosition=range.text.length;    }    return cursurPosition;}