/* An autosuggest textbox control. @class, @scope public */
function AutoSuggestControl(oTextbox,oProvider){this.cur=-1;this.layer=null;this.provider=oProvider;this.textbox=oTextbox;this.init();}
/* Autosuggests one or more suggestions for what the user has typed. If no suggestions are passed in, then no autosuggest occurs. @scope private, @param aSuggestions An array of suggestion strings. @param bTypeAhead If the control should provide a type ahead suggestion. */
AutoSuggestControl.prototype.autosuggest=function(aSuggestions,bTypeAhead){
//make sure there's at least one suggestion
if(aSuggestions.length>0){if(bTypeAhead){this.typeAhead(aSuggestions[0]);}this.showSuggestions(aSuggestions);}else{this.hideSuggestions();}
};
/* Creates the dropdown layer to display multiple suggestions. @scope private */
AutoSuggestControl.prototype.createDropDown=function(){
var oThis=this;
//create the layer and assign styles
this.layer=document.createElement("div");
this.layer.className="suggestions";
this.layer.style.visibility="hidden";
//when the user clicks on the a suggestion, get the text (innerHTML) and place it into a textbox
this.layer.onmousedown=this.layer.onmouseup=this.layer.onmouseover=function (oEvent){
    oEvent=oEvent||window.event;
    oTarget=oEvent.target||oEvent.srcElement;
    if(oEvent.type=="mousedown"){
        
        oThis.textbox.value=oTarget.firstChild.nodeValue;
        oThis.hideSuggestions();
        var d=document.getElementById('ctl00_ctl00_top_ibtnSearch');
        if(d==null){d=document.getElementById('ctl00_top_ibtnSearch');}
        d.click();
    }else if(oEvent.type=="mouseover"){oThis.highlightSuggestion(oTarget);}
    else{oThis.textbox.focus();}
};
document.body.appendChild(this.layer);
};
/* Gets the left coordinate of the textbox. @scope private, @return The left coordinate of the textbox in pixels. */
AutoSuggestControl.prototype.getLeft=function (){
var oNode=this.textbox;
var iLeft=0;
while(oNode.tagName!="BODY"){
    iLeft+=oNode.offsetLeft;
    oNode=oNode.offsetParent;
}
var ver=getInternetExplorerVersion();
if(ver>-1){if(ver>=2.0){iLeft=iLeft+10;}}
return iLeft;
};
/* Gets the top coordinate of the textbox. @scope private, @return The top coordinate of the textbox in pixels. */
AutoSuggestControl.prototype.getTop=function (){
var oNode=this.textbox;
var iTop=0;
while(oNode.tagName!="BODY"){
    iTop+=oNode.offsetTop;
    oNode=oNode.offsetParent;
}
var ver=getInternetExplorerVersion();
if(ver>-1){if(ver>=2.0){iTop=iTop;}}
return iTop;
};
/* Handles three keydown events. @scope private. @param oEvent The event object for the keydown event. */
AutoSuggestControl.prototype.handleKeyDown=function (oEvent){
switch(oEvent.keyCode){
    case 38: //up arrow
        this.previousSuggestion();
        break;
    case 40: //down arrow 
        this.nextSuggestion();
        break;
    case 13: //enter
        this.hideSuggestions();
        break;
}
};
/* Handles keyup events. @scope private. @param oEvent The event object for the keyup event. */
AutoSuggestControl.prototype.handleKeyUp=function (oEvent){
var iKeyCode=oEvent.keyCode;
//for backspace (8) and delete (46), shows suggestions without typeahead
if(iKeyCode==8||iKeyCode==46){this.provider.requestSuggestions(this,false,1);} //make sure not to interfere with non-character keys
else if(iKeyCode<32||(iKeyCode>=33&&iKeyCode<46)||(iKeyCode>=112&&iKeyCode<=123)){} //ignore
else{this.provider.requestSuggestions(this, true, 1);} //request suggestions from the suggestion provider with typeahead
};
/* Hides the suggestion dropdown. @scope private. */
AutoSuggestControl.prototype.hideSuggestions=function (){this.layer.style.visibility="hidden";};
/* Highlights the given node in the suggestions dropdown. @scope private. @param oSuggestionNode The node representing a suggestion in the dropdown. */
AutoSuggestControl.prototype.highlightSuggestion=function (oSuggestionNode){
for(var i=0;i<this.layer.childNodes.length;i++){
    var oNode=this.layer.childNodes[i];
    if(oNode==oSuggestionNode){oNode.className="current";}else if(oNode.className=="current"){oNode.className="";}
}
};
/* Initializes the textbox with event handlers for auto suggest functionality. @scope private */
AutoSuggestControl.prototype.init=function (){
//save a reference to this object
var oThis=this;
//assign the onkeyup event handler
this.textbox.onkeyup=function (oEvent){
    //check for the proper location of the event object
    if(!oEvent){oEvent=window.event;}
    //call the handleKeyUp() method with the event object
    oThis.handleKeyUp(oEvent);
};
//assign onkeydown event handler
this.textbox.onkeydown=function (oEvent){
    //check for the proper location of the event object
    if(!oEvent){oEvent=window.event;}
    //call the handleKeyDown() method with the event object
    oThis.handleKeyDown(oEvent);
};
//assign onblur event handler (hides suggestions)
this.textbox.onblur=function (){oThis.hideSuggestions();};
//create the suggestions dropdown
this.createDropDown();
};
/* Highlights the next suggestion in the dropdown and places the suggestion into the textbox. @scope private */
AutoSuggestControl.prototype.nextSuggestion=function (){
var cSuggestionNodes=this.layer.childNodes;
if(cSuggestionNodes.length>0&&this.cur<cSuggestionNodes.length-1){
    var oNode=cSuggestionNodes[++this.cur];
    this.highlightSuggestion(oNode);
    this.textbox.value=oNode.firstChild.nodeValue;
}
};
/* Highlights the previous suggestion in the dropdown and places the suggestion into the textbox. @scope private */
AutoSuggestControl.prototype.previousSuggestion=function (){
var cSuggestionNodes=this.layer.childNodes;
if(cSuggestionNodes.length>0&&this.cur>0){
    var oNode=cSuggestionNodes[--this.cur];
    this.highlightSuggestion(oNode);
    this.textbox.value=oNode.firstChild.nodeValue;
}
};
/* Selects a range of text in the textbox. @scope public. @param iStart The start index (base 0) of the selection. @param iLength The number of characters to select. */
AutoSuggestControl.prototype.selectRange=function (iStart,iLength){
//use text ranges for Internet Explorer
if(this.textbox.createTextRange){
    var oRange=this.textbox.createTextRange();
    oRange.moveStart("character",iStart);
    oRange.moveEnd("character",iLength-this.textbox.value.length);
    oRange.select();
    //use setSelectionRange() for Mozilla
}else if(this.textbox.setSelectionRange){this.textbox.setSelectionRange(iStart,iLength);}
//set focus back to the textbox
this.textbox.focus();
};
/* Builds the suggestion layer contents, moves it into position, and displays the layer. @scope private. @param aSuggestions An array of suggestions for the control. */
AutoSuggestControl.prototype.showSuggestions=function (aSuggestions){
var oDiv=null;
this.layer.innerHTML=""; //clear contents of the layer
for(var i=0;i<aSuggestions.length;i++){
    oDiv=document.createElement("div");
    oDiv.appendChild(document.createTextNode(aSuggestions[i]));
    this.layer.appendChild(oDiv);
}
this.layer.style.left=this.getLeft()+"px";
this.layer.style.top=(this.getTop()+this.textbox.offsetHeight)+"px";
this.layer.style.visibility="visible";
};
/* Inserts a suggestion into the textbox, highlighting the suggested part of the text. @scope private. @param sSuggestion The suggestion for the textbox. */
AutoSuggestControl.prototype.typeAhead=function (sSuggestion){
//check for support of typeahead functionality
if(this.textbox.createTextRange||this.textbox.setSelectionRange){
    var iLen=this.textbox.value.length;
    this.textbox.value=sSuggestion;
    this.selectRange(iLen,sSuggestion.length);
}
};
AutoSuggestControl.prototype.showSuggestion=function (sSuggestion){this.provider.requestSuggestions(this,false,0);};
/*new function; not present in original*/
function getInternetExplorerVersion(){
// Returns the version of Internet Explorer or a -1 (indicating the use of another browser).
var rv=-1; // Return value assumes failure.
if(navigator.appName=='Microsoft Internet Explorer'){
    var ua=navigator.userAgent;
    var re=new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
    if(re.exec(ua)!=null){rv=parseFloat(RegExp.$1);}
}
return rv;
}