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设置input光标位置：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<input type="text" id="test-input" value="Example" />
<input type="text" id="test-input2" value="Example" />
</body>
<script>
function setCaretPosition(ctrl, pos) {
// Modern browsers
if(ctrl.setSelectionRange) {
ctrl.focus();
ctrl.setSelectionRange(pos, pos);
// IE8 and below
} else if(ctrl.createTextRange) {
var range = ctrl.createTextRange();
range.collapse(true);
range.moveEnd('character', pos);
range.moveStart('character', pos);
range.select();
}
}
var input = document.getElementById('test-input');
setCaretPosition(input, input.value.length);
</script>
</html>注意：不支持type为number类型的input