function autoCompleteDB()
{
    this.aNames=new Array();
}

autoCompleteDB.prototype.assignArray=function(aList)
{
    this.aNames=aList;
};

autoCompleteDB.prototype.getMatches=function(str,aList,maxSize)
{
    /* debug */ //alert(maxSize+"ok getmatches");
    var ctr=0;
    for(var i in this.aNames)
    {
	    if(this.aNames[i].toLowerCase().indexOf(str.toLowerCase())>=0) /*looking for case insensitive matches */
	    {
		    aList.push(this.aNames[i]);
		    ctr++;
	    }
//	    else
//	    {
//	        var mySplitResult = this.aNames[i].split(" ");        		     
//		    for(var j in  mySplitResult)
//	        {
//		        //alert(mySplitResult[j]);
//		        if(mySplitResult[j].toLowerCase().indexOf(str.toLowerCase())==0) /*looking for case insensitive matches */
//                {                     
//                    aList.push(this.aNames[i]);                    
//                    ctr++;                     
//                }
//		    }	     
//		}
	    
	    
	    if(ctr==(maxSize-1)) /* counter to limit no of matches to maxSize */
		    break;
		    
		    
    }
//    // changes done by prajakta on 23rd July for allowing any word in text to be searched
//    for(var i in this.aNames)
//    {
//            var mySplitResult = this.aNames[i].split(" ");        
//            if(mySplitResult!=null)
//            {
//                if(mySplitResult.length > 0)
//                {
//        
//                for(j = 0; j < mySplitResult.length; j++)
//                {
//                   
//	                if(this.mySplitResult[j].toLowerCase().indexOf(str.toLowerCase())==0) /*looking for case insensitive matches */
//	                {
//		                aList.push(this.aNames[i]);
//		                ctr++;
//	                }
//	                if(ctr==(maxSize-1)) /* counter to limit no of matches to maxSize */
//		                break;
//		        }
//		    }
//		}
//    }
    
};

function autoComplete(aNames,oText,oDiv,lDiv,maxSize)
{

    this.oText=oText;
    this.oDiv=oDiv;
    this.lDiv=lDiv;
    this.maxSize=maxSize;
    this.cur=-1;

	
    /*debug here */
    //alert(oText+","+this.oDiv);
	
    this.db=new autoCompleteDB();
    this.db.assignArray(aNames);
	
    oText.onkeyup=this.keyUp;
    oText.onkeydown=this.keyDown;
    oText.autoComplete=this;
    oText.onblur=this.hideSuggest;
}

autoComplete.prototype.hideSuggest=function()
{
    this.autoComplete.oDiv.style.visibility="hidden";
    this.autoComplete.lDiv.style.visibility="hidden";
};

autoComplete.prototype.selectText=function(iStart,iEnd)
{
    if(this.oText.createTextRange) /* For IE */
    {
	    var oRange=this.oText.createTextRange();
	    oRange.moveStart("character",iStart);
	    oRange.moveEnd("character",iEnd-this.oText.value.length);
	    oRange.select();
    }
    else if(this.oText.setSelectionRange) /* For Mozilla */
    {
	    this.oText.setSelectionRange(iStart,iEnd);
    }
    this.oText.focus();
};

autoComplete.prototype.textComplete=function(sFirstMatch)
{
    if(this.oText.createTextRange || this.oText.setSelectionRange)
    {
	    var iStart=this.oText.value.length;
	    //this.oText.value=sFirstMatch;
	    this.selectText(iStart,sFirstMatch.length);
    }
};

autoComplete.prototype.keyDown=function(oEvent)
{
    oEvent=window.event || oEvent;
    iKeyCode=oEvent.keyCode;
    switch(iKeyCode)
    {
	    case 38: //up arrow
		    this.autoComplete.moveUp();
		    break;
	    case 40: //down arrow
		    this.autoComplete.moveDown();
		    break;
//	    case 13: //return key -- commented by prajakta on 20th July 2009
//		    window.focus();
//		    break;
    }
};

autoComplete.prototype.moveDown=function()
{
    if(this.oDiv.childNodes.length>0 && this.cur<(this.oDiv.childNodes.length-1))
    {
	    ++this.cur;
	    for(var i=0;i<this.oDiv.childNodes.length;i++)
	    {
		    if(i==this.cur)
		    {
			    this.oDiv.childNodes[i].className="over";
			    this.oText.value=this.oDiv.childNodes[i].innerHTML;
			    
			    this.lDiv.childNodes[i].className="over";
		    }
		    else
		    {
			    this.oDiv.childNodes[i].className="";
			    this.lDiv.childNodes[i].className="";
		    }
	    }
    }
};

autoComplete.prototype.moveUp=function()
{
    if(this.oDiv.childNodes.length>0 && this.cur>0)
    {
	    --this.cur;
	    for(var i=0;i<this.oDiv.childNodes.length;i++)
	    {
		    if(i==this.cur)
		    {
			    this.oDiv.childNodes[i].className="over";
			    this.oText.value=this.oDiv.childNodes[i].innerHTML;
			    
			    this.lDiv.childNodes[i].className="over";
		    }
		    else
		    {
			    this.oDiv.childNodes[i].className="";				    
			    
			    this.lDiv.childNodes[i].className="";				    
		    }
	    }
    }  	    	    	    
};

autoComplete.prototype.keyUp=function(oEvent)
{
    oEvent=oEvent || window.event;
    var iKeyCode=oEvent.keyCode;
    if(iKeyCode==8 || iKeyCode==46)
    {
	    this.autoComplete.onTextChange(false); /* without autocomplete */
    }
    else if (iKeyCode < 32 || (iKeyCode >= 33 && iKeyCode <= 46) || (iKeyCode >= 112 && iKeyCode <= 123)) 
    {
        //ignore
    } 
    else 
    {
	    this.autoComplete.onTextChange(true); /* with autocomplete */
    }
};

autoComplete.prototype.positionSuggest=function() /* to calculate the appropriate poistion of the dropdown */
{
    var oNode=this.oText;
    var x=0,y=oNode.offsetHeight;
   
    while(oNode.offsetParent && oNode.offsetParent.tagName.toUpperCase() != 'BODY')
    {
	    x+=oNode.offsetLeft;
	    y+=oNode.offsetTop;
	    oNode=oNode.offsetParent;
    }

    x+=oNode.offsetLeft;
    y+=oNode.offsetTop;
   
    this.oDiv.style.top=y+"px";
    this.oDiv.style.left=x+"px";
    
    this.lDiv.style.top=y+"px";
    this.lDiv.style.left=x+"px";
}

autoComplete.prototype.onTextChange=function(bTextComplete)
{
    var txt=this.oText.value;
    var oThis=this;
    this.cur=-1;
	
    if(txt.length>0)
    {
	    while(this.oDiv.hasChildNodes()){
		    this.oDiv.removeChild(this.oDiv.firstChild);
        }
		
	    var aStr=new Array();
	    this.db.getMatches(txt,aStr,this.maxSize);
	    if(!aStr.length) {this.hideSuggest ;return}
	    if(bTextComplete) this.textComplete(aStr[0]);
	    this.positionSuggest();
		
	    for(i in aStr)
	    {
		    var oNew=document.createElement('div');
		    this.oDiv.appendChild(oNew);
		    oNew.onmouseover=
		    oNew.onmouseout=
		    oNew.onmousedown=function(oEvent)
		    {
			    oEvent=window.event || oEvent;
			    oSrcDiv=oEvent.target || oEvent.srcElement;

			    //debug :window.status=oEvent.type;
			    if(oEvent.type=="mousedown")
			    {
				    oThis.oText.value=this.innerHTML;
			    }
			    else if(oEvent.type=="mouseover")
			    {
				    this.className="over";
			    }
			    else if(oEvent.type=="mouseout")
			    {
				    this.className="";
			    }
			    else
			    {
				    this.oText.focus();
			    }
		    };
		    oNew.innerHTML=aStr[i];
		    
		    var oNew1=document.createElement('div');
		    this.lDiv.appendChild(oNew1);
		    oNew1.onmouseout=function(oEvent)
		    {
		        oEvent=window.event || oEvent;
			    oSrcDiv=oEvent.target || oEvent.srcElement;
		        
		        //debug :window.status=oEvent.type;
			    if(oEvent.type=="mousedown")
			    {
				    oThis.oText.value=this.innerHTML;
			    }
			    else if(oEvent.type=="mouseover")
			    {
				    this.className="over";
			    }
			    else if(oEvent.type=="mouseout")
			    {
				    this.className="";
			    }
			    else
			    {
				    this.oText.focus();
			    }
		    }
	    }
		
	    this.oDiv.style.visibility="visible";
	    this.lDiv.style.visibility="visible";
    }
    else
    {
	    this.oDiv.innerHTML="";
	    this.oDiv.style.visibility="hidden";
	    
	    this.lDiv.innerHTML="";
	    this.lDiv.style.visibility="hidden";
    }
};