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php+ajax 仿google 下拉框代码二-网络编程

来源:[db:来源]标题:   列表    编辑:电脑技术全能网 时间:2019-09-18 16:51

原标题:php+ajax 仿google 下拉框代码二-网络编程
   CREATE TABLE `suggest` ( `id` int(10) unsigned NOT NULL auto_increment, `keyword` varchar(50) NOT NULL, `num` int(10) unsigned NOT NULL, PRIMARY KEY (`id`)) ENGINE=MyISAM DEFAULT CHARSET=gb2312 AUTO_INCREMENT=59 ;/* **************************** *** http://www.hansir.cn *** *****************************/String.prototype.ltrim = function(){ return this.replace(/^s*(.+?)$/,'$1');}//这里援用prototype的五个方式function $(){return document.getElementById(arguments[0]);}Object.extend = function(destination, source){ for(property in source) destination[property] = source[property]; return destination;}function $A(iterable) { var results = []; for (var i = 0; i < iterable.length; i++)results.push(iterable[i]); return results;}Function.prototype.bindAsEventListener = function(object) { var __method = this; return function(event) { return __method.call(object, event || window.event); }}Function.prototype.bind = function() { var __method = this, args = $A(arguments), object = args.shift(); return function() { return __method.apply(object, args.concat($A(arguments))); }}var hansir = { url: 'http://www.hansir.cn'}hansir.AjAx = function(){this.initialize.apply(this, arguments);}hansir.AjAx.prototype = { initialize: function(complete, method, url){ this.complete = complete; this.method = method || 'post'; this.url = url; if (this.method == 'get') this.url += (this.url.match(/?/) ? '&' : '?'); }, xmlHttp: function(){ var xmlHttp; if(window.XMLHttpRequest) xmlHttp = new XMLHttpRequest(); else if(window.ActiveXObject) try{ xmlHttp = new ActiveXObject('Msxml2.XMLHTTP'); }catch(errr){ xmlHttp = new ActiveXObject('Microsoft.XMLHTTP'); } return xmlHttp; }, request: function(parameters){ var xmlHttp = this.xmlHttp(); var send_val = null; this.method=='get' ? this.url += parameters : send_val = parameters; xmlHttp.open(this.method, this.url, true); xmlHttp.setRequestHeader('Content-type', 'application/x-www-form-urlencoded; charset=utf-8'); xmlHttp.onreadystatechange = this.ready_handler.bind(this, xmlHttp); xmlHttp.send(send_val); }, ready_handler: function(xmlHttp){ if(xmlHttp.readyState == 4){ if(this.success(xmlHttp)){ this.complete.load_data(xmlHttp); } } }, success: function(xmlHttp){return xmlHttp.status == 0 || xmlHttp.status >= 200 && xmlHttp.status < 300}}hansir.TextSuggest = function(){this.initialize.apply(this, arguments);}hansir.TextSuggest.prototype = { initialize: function(){}, add_suggest: function(inp, url, method, defer, defer2){ var inp = $(inp); inp.defer = defer || null; inp.defer2 = defer2 || 200; var sw = inp.offsetWidth, sh = inp.offsetHeight; inp.suggest_list = this.create_list(sw, sh); inp.suggest_list.par = inp; inp.xmlHttp = new hansir.AjAx(inp.suggest_list, method, url); Object.extend(inp, { requesting : false, last_result : true, previous_value : null, last_value : null, kt : null, rt : null, load_event: function(){ if(this.addEventListener){ this.addEventListener('input', this.keyup_handler.bindAsEventListener(this),false); }else if(this.attachEvent){ this.attachEvent('onkeyup', this.keyup_handler.bindAsEventListener(this)); } }, keyup_handler:function(e){ var intKey; window.event ? intKey = event.keyCode : intKey = e.which; if(intKey == 38 || intKey == 40 || intKey == 13 || intKey == 37) return; if(this.requesting) return; var val = this.value.ltrim(); this.last_value = val; if(val == this.previous_value) return; if(val==''){ this.previous_value = ''; this.last_value=''; this.suggest_list.hidden(); this.suggest_list.clear_data(); return; } if(new RegExp('^'+this.last_result,'i').test(val)) return; this.last_result = true; this.previous_value = val; if(this.kt) clearTimeout(this.kt); this.defer?this.kt = setTimeout(this.send_request.bind(this), this.defer):this.send_request(); }, onblur: function(){ setTimeout(this.suggest_list.hidden.bind(this.suggest_list), 100); }, onkeydown: function(e){ // 高低、回车键变乱 if(!this.suggest_list.rows.length) return; var intKey; window.event ? intKey = event.keyCode : intKey = e.which; switch(intKey){ case 38: if(this.suggest_list.style.visibility=='hidden'){ this.suggest_list.visible(); return; } var val = this.suggest_list.select_index(1); val?this.value=val : this.value = this.last_value; break; case 40: if(this.suggest_list.style.visibility=='hidden'){ this.suggest_list.visible(); return; } var val=this.suggest_list.select_index(0); val?this.value=val : this.value = this.last_value; break; case 13: if(this.suggest_list.cur_tr!=-1){ this.suggest_list.hidden(); break; } case 39: this.suggest_list.hidden(); this.keyup_handler('o'); } }, send_request: function(){ // 恳求数据 this.requesting = true; var val = this.value; var parameters = 'keyword=' + val.ltrim(); this.xmlHttp.request(parameters); this.start_hidden_time(); }, start_hidden_time: function(){ if(this.rt) clearTimeout(this.rt); this.rt = setTimeout(this.list_hidden.bind(this), this.defer2); }, list_hidden: function(){ if(this.requesting) this.suggest_list.hidden(); } }); inp.load_event(); }, create_list: function(w, h){ //创立列表 var table = document.createElement('table'); table.cellSpacing = 0; document.body.appendChild(table); table.className = 'tab_suggest'; table.style.width = w + 'px'; table.parh = h-1; Object.extend(table,{ cur_tr: -1, set_pos: function(){ // 下垃框地位 var x=0, y=0, inp = this.par; while(inp != null){x += inp.offsetLeft;y += inp.offsetTop;inp = inp.offsetParent;} inp = null; table.style.left = x + 'px'; table.style.top = y+this.parh+ 'px'; }, add: function(str, num){ var n=0; this.rows.length ? n=this.rows.length : n = 0; var tr = this.insertRow(n); var th = document.createElement('th'); var td = document.createElement('td'); th.innerHTML = str, td.innerHTML = num; tr.appendChild(th), tr.appendChild(td); tr.num = this.rows.length-1; tr.par = this; tr.onmouseover = function(){ var par = this.par; if(par.cur_tr!=-1 && par.cur_tr!=this.num){ par.rows[par.cur_tr].className=''; this.className = 'cur'; par.cur_tr = this.num; }else{ this.className = 'cur'; par.cur_tr = this.num; } } tr.onclick = function(){ var par = this.par.par; par.value = this.cells[0].innerHTML; } tr = null, th = null, td = null; }, load_data: function(xmlHttp){ // 加载列表 var inp = this.par; if(inp.previous_value != inp.value){ inp.requesting = false; this.clear_data(); inp.keyup_handler('o'); return; } var arr = xmlHttp.responseText; if(arr.ltrim() == 'null'){ inp.last_result = inp.value; inp.requesting = false; inp.suggest_list.hidden(); this.clear_data(); return; } var cur_data = eval(arr); this.clear_data(); for(var i=0; i<cur_data.length; i++)this.add(cur_data[i][0],cur_data[i][1]); this.cur_tr = -1; this.visible(); inp.requesting = false; }, clear_data: function(){while(this.rows.length)this.deleteRow(this.rows[0])}, // 清空列表 select_index: function(n){ // 挪动选项 if(n){ if(this.cur_tr==0){ this.rows[0].className = ''; this.cur_tr = -1; return false; }else{ this.cur_tr==-1?this.cur_tr=this.rows.length : this.rows[this.cur_tr].className = ''; this.cur_tr = this.cur_tr-1; this.rows[this.cur_tr].className = 'cur'; return this.rows[this.cur_tr].cells[0].innerHTML; } }else{ if(this.cur_tr == (this.rows.length-1)){ this.rows[this.cur_tr].className= ''; this.cur_tr = -1; return false; }else{ if(this.cur_tr!=-1)this.rows[this.cur_tr].className = ''; this.cur_tr = this.cur_tr+1; this.rows[this.cur_tr].className = 'cur'; return this.rows[this.cur_tr].cells[0].innerHTML; } } }, hidden: function(){this.style.visibility = 'hidden';}, // 隐 visible: function(){this.set_pos(); this.style.visibility = 'visible';} // 显 }); return table; }}

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