<input value="你在我的心里永远是故乡！" onclick="getTextFocusIndex()" />
function getTextFocusIndex(){
var input = document.getElementById("input1");
var cursurPosition=0;
if(input.selectionStart){//非IE
cursurPosition= input.selectionStart;
}else{//IE
try{
var range = document.selection.createRange();
range.moveStart("character",-input.value.length);
cursurPosition=range.text.length;
}catch(e){
cursurPosition = 0;
}
}
console.log("当前位置", cursurPosition)
}