<button type="button" onclick="setLabel(this);" data-val="插入内容">按钮</button>
<input type="text" id="share_title">
function setLabel(obj) {
var val = $(obj).attr('data-val');
$('#share_title').insertAtFocus(val);
}
(function($){
$.fn.extend({
insertAtFocus: function(myValue){
var $t=$(this)[0];
if (document.selection) {
this.focus();
sel = document.selection.createRange();
sel.text = myValue;
this.focus();
}
else
if ($t.selectionStart || $t.selectionStart == '0') {
var startPos = $t.selectionStart;
var endPos = $t.selectionEnd;
var scrollTop = $t.scrollTop;
$t.value = $t.value.substring(0, startPos) + myValue + $t.value.substring(endPos, $t.value.length);
this.focus();
$t.selectionStart = startPos + myValue.length;
$t.selectionEnd = startPos + myValue.length;
$t.scrollTop = scrollTop;
}
else {
this.value += myValue;
this.focus();
}
}
})
})(jQuery);
