function AutoSuggestControl(oTextbox,oProvider){this.cur=-1;this.layer=null;this.provider=oProvider;this.textbox=oTextbox;this.init();}
AutoSuggestControl.prototype.autosuggest=function(aSuggestions,bTypeAhead){if(aSuggestions&&aSuggestions.length>0){if(bTypeAhead){this.typeAhead(aSuggestions[0]);}
this.showSuggestions(aSuggestions);}else{this.hideSuggestions();}};AutoSuggestControl.prototype.createDropDown=function(){var oThis=this;this.layer=document.createElement("div");this.layer.className="suggestions";this.layer.style.visibility="hidden";this.layer.style.width=this.textbox.offsetWidth;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();}else if(oEvent.type=="mouseover"){oThis.highlightSuggestion(oTarget);}else{oThis.textbox.focus();}};document.body.appendChild(this.layer);};AutoSuggestControl.prototype.getLeft=function(){var oNode=this.textbox;var iLeft=0;while(oNode.tagName!="BODY"){iLeft+=oNode.offsetLeft;oNode=oNode.offsetParent;}
return iLeft;};AutoSuggestControl.prototype.getTop=function(){var oNode=this.textbox;var iTop=0;while(oNode.tagName!="BODY"){iTop+=oNode.offsetTop;oNode=oNode.offsetParent;}
return iTop;};AutoSuggestControl.prototype.handleKeyDown=function(oEvent){switch(oEvent.keyCode){case 38:this.previousSuggestion();break;case 40:this.nextSuggestion();break;case 13:this.hideSuggestions();break;}};AutoSuggestControl.prototype.handleKeyUp=function(oEvent){var iKeyCode=oEvent.keyCode;if(iKeyCode==8||iKeyCode==46){this.provider.requestSuggestions(this,false);}else if(iKeyCode<32||(iKeyCode>=33&&iKeyCode<46)||(iKeyCode>=112&&iKeyCode<=123)){}else{this.provider.requestSuggestions(this,true);}};AutoSuggestControl.prototype.hideSuggestions=function(){this.layer.style.visibility="hidden";};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="";}}};AutoSuggestControl.prototype.init=function(){var oThis=this;this.textbox.onkeyup=function(oEvent){if(!oEvent){oEvent=window.event;}
oThis.handleKeyUp(oEvent);};this.textbox.onkeydown=function(oEvent){if(!oEvent){oEvent=window.event;}
oThis.handleKeyDown(oEvent);};this.textbox.onblur=function(){oThis.hideSuggestions();};this.createDropDown();};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;}};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;}};AutoSuggestControl.prototype.selectRange=function(iStart,iLength){if(this.textbox.createTextRange){var oRange=this.textbox.createTextRange();oRange.moveStart("character",iStart);oRange.moveEnd("character",iLength-this.textbox.value.length);oRange.select();}else if(this.textbox.setSelectionRange){this.textbox.setSelectionRange(iStart,iLength);}
this.textbox.focus();};AutoSuggestControl.prototype.showSuggestions=function(aSuggestions){var oDiv=null;this.layer.innerHTML="";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";};AutoSuggestControl.prototype.typeAhead=function(sSuggestion){if(this.textbox.createTextRange||this.textbox.setSelectionRange){var iLen=this.textbox.value.length;this.textbox.value=sSuggestion;this.selectRange(iLen,sSuggestion.length);}};