文本域光标操作（选、添、删、取）的jQuery扩展
; (function ($) { /* * 文本域光标操作（选、添、删、取）的jQuery扩展 @Mr.Think http://mrthink.net/text-field-jquery-extend/ */ $.fn.extend({ /* * 获取光标所在位置 */ iGetFieldPos: function () { var field = this.get(0); if (document.selection) { //IE $(this).focus(); var sel = document.selection; var range = sel.createRange(); var dupRange = range.duplicate(); dupRange.moveToElementText(field); dupRange.setEndPoint('EndToEnd', range); field.selectionStart = dupRange.text.length - range.text.length; field.selectionEnd = field.selectionStart + range.text.length; } return field.selectionStart; }, /* * 选中指定位置内字符 || 设置光标位置 * --- 从start起选中(含第start个)，到第end结束（不含第end个） * --- 若不输入end值，即为设置光标的位置（第start字符后） */ iSelectField: function (start, end) { var field = this.get(0); //end未定义，则为设置光标位置 if (arguments[1] == undefined) { end = start; } if (document.selection) { //IE var range = field.createTextRange(); range.moveEnd('character', -$(this).val().length); range.moveEnd('character', end); range.moveStart('character', start); range.select(); } else { //非IE field.setSelectionRange(start, end); $(this).focus(); } }, /* * 选中指定字符串 */ iSelectStr: function (str) { var field = this.get(0); var i = $(this).val().indexOf(str); i != -1 ? $(this).iSelectField(i, i + str.length) : false; }, /* * 在光标之后插入字符串 */ iAddField: function (str) { var field = this.get(0); var v = $(this).val(); var len = $(this).val().length; if (document.selection) { //IE $(this).focus() document.selection.createRange().text = str; } else { //非IE var selPos = field.selectionStart; $(this).val($(this).val().slice(0, field.selectionStart) + str + $(this).val().slice(field.selectionStart, len)); this.iSelectField(selPos + str.length); }; }, /* * 删除光标前面(-)或者后面(+)的n个字符 */ iDelField: function (n) { var field = this.get(0); var pos = $(this).iGetFieldPos(); var v = $(this).val(); //大于0则删除后面，小于0则删除前面 if(pos>0){
$(this).val(n > 0 ? v.slice(0, pos - n) + v.slice(pos) : v.slice(0, pos) + v.slice(pos - n)); $(this).iSelectField(pos - (n < 0 ? 0 : n));
} } }); })(jQuery);
应用场景
<!DOCTYPE html> <html> <head> <title>无标题页</title> <script type="text/javascript" src="http://sy.zgsapt.com/js/jquery-1.7.2.min.js"></script> <script type="text/javascript"> ; (function ($) { /* * 文本域光标操作（选、添、删、取）的jQuery扩展 @Mr.Think http://mrthink.net/text-field-jquery-extend/ */ $.fn.extend({ /* * 获取光标所在位置 */ iGetFieldPos: function () { var field = this.get(0); if (document.selection) { //IE $(this).focus(); var sel = document.selection; var range = sel.createRange(); var dupRange = range.duplicate(); dupRange.moveToElementText(field); dupRange.setEndPoint('EndToEnd', range); field.selectionStart = dupRange.text.length - range.text.length; field.selectionEnd = field.selectionStart + range.text.length; } return field.selectionStart; }, /* * 选中指定位置内字符 || 设置光标位置 * --- 从start起选中(含第start个)，到第end结束（不含第end个） * --- 若不输入end值，即为设置光标的位置（第start字符后） */ iSelectField: function (start, end) { var field = this.get(0); //end未定义，则为设置光标位置 if (arguments[1] == undefined) { end = start; } if (document.selection) { //IE var range = field.createTextRange(); range.moveEnd('character', -$(this).val().length); range.moveEnd('character', end); range.moveStart('character', start); range.select(); } else { //非IE field.setSelectionRange(start, end); $(this).focus(); } }, /* * 选中指定字符串 */ iSelectStr: function (str) { var field = this.get(0); var i = $(this).val().indexOf(str); i != -1 ? $(this).iSelectField(i, i + str.length) : false; }, /* * 在光标之后插入字符串 */ iAddField: function (str) { var field = this.get(0); var v = $(this).val(); var len = $(this).val().length; if (document.selection) { //IE $(this).focus() document.selection.createRange().text = str; } else { //非IE var selPos = field.selectionStart; $(this).val($(this).val().slice(0, field.selectionStart) + str + $(this).val().slice(field.selectionStart, len)); this.iSelectField(selPos + str.length); }; }, /* * 删除光标前面(-)或者后面(+)的n个字符 */ iDelField: function (n) { var field = this.get(0); var pos = $(this).iGetFieldPos(); var v = $(this).val(); //大于0则删除后面，小于0则删除前面 $(this).val(n > 0 ? v.slice(0, pos - n) + v.slice(pos) : v.slice(0, pos) + v.slice(pos - n)); $(this).iSelectField(pos - (n < 0 ? 0 : n)); } }); })(jQuery); $(document).ready(function () { $("#numd").bind("mouseleave", function () { document.getElementById('keybored').style.display = 'none'; document.getElementById('Nm').blur(); }); $("#Nm").focus(function () { document.getElementById('keybored').style.display = ''; }); $(".readbtns").click(function () { $("#Nm").iAddField($(this).val()); }); $(".returns").click(function () { $("#Nm").iDelField(1); }); }); </script> </head> <body> <ul> <li> <input /> <div> </div> </li> </ul> <input id="hid" type="text" value="" style="display: none" /> <span id="numd" style="border: 1px solid red; clear: both; display: inline-block; font: 800em;"> <input type="text" id="Nm" name="Nm" value="" /> <div style="display: none; border: 1px solid #A2B4C6; width: 150px; height: 400px;" id="keybored"> <input type="button" class="readbtns" value="1" /> <input type="button" class="readbtns" value="2" /> <input type="button" class="readbtns" value="3" /> <input type="button" class="readbtns" value="4" /> <input type="button" class="readbtns" value="5" /> <input type="button" class="readbtns" value="6" /> <input type="button" class="readbtns" value="7" /> <input type="button" class="readbtns" value="8" /> <input type="button" class="readbtns" value="9" /> <input type="button" class="returns" value="<<---" /> </div> </span> </body> </html>
经过查阅jQuery的hover
$('#hover_div').hover(function()
{
/* something to do on mouseenter */
},
function()
{
/* something to do on mouseleave */
});
所以上面的bind("mouseleave")完全可以用hover函数
$("#numd").hover(function () {
document.getElementById('keybored').style.display = '';
}, function () {
document.getElementById('keybored').style.display = 'none';
document.getElementById('Nm').blur();
});
