Implémentation de la fonction de correspondance automatique de la zone de saisie de type Baidu basée sur les compétences javascript

Implémentation de la fonction de correspondance automatique de la zone de saisie de type Baidu basée sur les compétences javascript_javascript

WBOY

Libérer： 2016-05-16 15:22:18

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1627 Les gens l'ont consulté

本文实例讲解了基于javascript实现仿百度输入框自动匹配功能的详细代码，现在很多网站都有这种效果，在文本框输入一个字符，下边会出来相匹配的内容，这个代码就演示了这个功能是如何完成的，当然，这是个静态的，你可以将提示的内容从数据库读取出来，要用到AJAX那东东，分享给大家供大家参考，具体内容如下

<HTML> 
<HEAD> 
<title>带输入匹配的文本框</title> 
<style> 
body,div { 
font-family:verdana; 
line-height:100%; 
font-size:10pt; 
} 
input { 
width:320px; 
} 
h1 { 
text-align:center; 
font-size:2.2em; 
} 
#divc { 
border:1px solid #555; 
} 
.des { 
width:500px; 
background-color:lightyellow; 
border:1px solid #555; 
padding:25px; 
margin-top:25px; 
} 
.mouseover { 
color:#ffffff; 
background-color:highlight; 
width:100%; 
cursor:default; 
} 
.mouseout { 
color:#000; 
width:100%; 
background-color:#ffffff; 
cursor:default; 
} 
</style> 
<SCRIPT LANGUAGE="JavaScript"> 
<!-- 
function jsAuto(instanceName,objID) 
{ 
this._msg = []; 
this._x = null; 
this._o = document.getElementById( objID ); 
if (!this._o) return; 
this._f = null; 
this._i = instanceName; 
this._r = null; 
this._c = 0; 
this._s = false; 
this._v = null; 
this._o.style.visibility = "hidden"; 
this._o.style.position = "absolute"; 
this._o.style.zIndex = "9999"; 
this._o.style.overflow = "auto"; 
this._o.style.height = "50"; 
return this; 
};

jsAuto.prototype.directionKey=function() { with (this)
{
var e = _e.keyCode &#63; _e.keyCode : _e.which;
var l = _o.childNodes.length;
(_c>l-1 || _c<0) &#63; _s=false : "";

if( e==40 && _s )
{
_o.childNodes[_c].className="mouseout";
(_c >= l-1) &#63; _c=0 : _c ++;
_o.childNodes[_c].className="mouseover";
}
if( e==38 && _s )
{
_o.childNodes[_c].className="mouseout";
_c--<=0 &#63; _c = _o.childNodes.length-1 : "";
_o.childNodes[_c].className="mouseover";
}
if( e==13 )
{
if(_o.childNodes[_c] && _o.style.visibility=="visible")
{
_r.value = _x[_c];
_o.style.visibility = "hidden";
}
}
if( !_s )
{
_c = 0;
_o.childNodes[_c].className="mouseover";
_s = true;
}
}};

// mouseEvent.
jsAuto.prototype.domouseover=function(obj) { with (this)
{
_o.childNodes[_c].className = "mouseout";
_c = 0;
obj.tagName=="DIV" &#63; obj.className="mouseover" : obj.parentElement.className="mouseover";
}};
jsAuto.prototype.domouseout=function(obj)
{
obj.tagName=="DIV" &#63; obj.className="mouseout" : obj.parentElement.className="mouseout";
};
jsAuto.prototype.doclick=function(msg) { with (this)
{
if(_r)
{
_r.value = msg;
_o.style.visibility = "hidden";
}
else
{
alert("javascript autocomplete ERROR :\n\n can not get return object.");
return;
}
}};

// object method;
jsAuto.prototype.item=function(msg)
{
if( msg.indexOf(",")>0 )
{
var arrMsg=msg.split(",");
for(var i=0; i<arrMsg.length; i++)
{
arrMsg[i] &#63; this._msg.push(arrMsg[i]) : "";
}
}
else
{
this._msg.push(msg);
}
this._msg.sort();
};
jsAuto.prototype.append=function(msg) { with (this)
{
_i &#63; "" : _i = eval(_i);
_x.push(msg);
var div = document.createElement("DIV");
//bind event to object.
div.onmouseover = function(){_i.domouseover(this)};
div.onmouseout = function(){_i.domouseout(this)};
div.onclick = function(){_i.doclick(msg)};
var re = new RegExp("(" + _v + ")","i");
div.style.lineHeight="140%";
div.className = "mouseout";
if (_v) div.innerHTML = msg.replace(re , "<strong>$1</strong>");
div.style.fontFamily = "verdana";

_o.appendChild(div);
}};
jsAuto.prototype.display=function() { with(this)
{
if(_f && _v!="")
{
_o.style.left = _r.offsetLeft;
_o.style.width = _r.offsetWidth;
_o.style.top = _r.offsetTop + _r.offsetHeight;
_o.style.visibility = "visible";
}
else
{
_o.style.visibility="hidden";
}
}};
jsAuto.prototype.handleEvent=function(fValue,fID,event) { with (this)
{
var re;
_e = event;
var e = _e.keyCode &#63; _e.keyCode : _e.which;
_x = [];
_f = false;
_r = document.getElementById( fID );
_v = fValue;
_i = eval(_i);
re = new RegExp("^" + fValue + "", "i");
_o.innerHTML="";

for(var i=0; i<_msg.length; i++)
{
if(re.test(_msg[i]))
{
_i.append(_msg[i]);
_f = true;
}
}

_i &#63; _i.display() : alert("can not get instance");

if(_f)
{
if((e==38 || e==40 || e==13))
{
_i.directionKey();
}
else
{
_c=0;
_o.childNodes[_c].className = "mouseover";
_s=true;
}
}
}};
window.onerror=new Function("return true;");
//-->
</SCRIPT>
</HEAD>

<BODY>
<div id="divc">
<!--this is the autocomplete container.-->
</div>
<div align="center">
<input onkeyup="jsAutoInstance.handleEvent(this.value,'auto',event)" id="auto">
</div>

<SCRIPT LANGUAGE="JavaScript">
<!--
var jsAutoInstance = new jsAuto("jsAutoInstance","divc");
jsAutoInstance.item("a-start,b-start,c-start,d-start,e-start,f-start,g-start,h-start,i-start,j-start,k-start,l-start,m-start,n-start,o-start,p-start,q-start,r-start,s-start,t-start,u-start,v-start,w-start,x-start,y-start,z-start,z-start,a-start,b-start,c-start,d-start,e-start,f-start,g-start,h-start,i-start,j-start,k-start,l-start,m-start,n-start,o-start,p-start,q-start,r-start,s-start,t-start,u-start,v-start,w-start,x-start,y-start,z-start,u-start,v-start,w-start,x-start,y-start,z-start,z-start,a-start,b-start,c-start,y-start,z-start,z-start,a-start,b-start,c-start,d-start,e-start,f-start,g-start,h-start,i-start,s-start,w-start,x-start,y-start,z-start,z-start,a-start,b-start,c-start,d-start,e-start,f-start,g-start,h-start,i-start,a-start,b-start,c-start,d-start,e-start,z-start,z-start");
jsAutoInstance.item("blueDestiny");
jsAutoInstance.item("BlueMiracle,Blue");
jsAutoInstance.item("angela,geniuslau");
jsAutoInstance.item("never-online");
//-->
</SCRIPT>
<center>请在输入框输入一个字母：</center>
</BODY>
</HTML>

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希望本文所述对大家学习javascript程序设计有所帮助。