function CreateXHR() {
	var request = false;
    try {
    	request = new ActiveXObject('Msxml2.XMLHTTP');
	}catch (err2) {
    	try {
			request = new ActiveXObject('Microsoft.XMLHTTP');
      	}catch (err3) {
			try {
				request = new XMLHttpRequest();
			}catch (err1){
				request = false;
			}
		}
	}
	return request;
}
function clearScreen(id){
	window.parent.frames['mainbody'].document.getElementById(id).innerHTML = "";              	
}
function upperCase(id){
	window.parent.frames['mainbody'].document.getElementById(id).value = window.parent.frames['mainbody'].document.getElementById(id).value.toUpperCase();	
}
function ajaxObject(url, callbackFunction) {
	var that=this;      
  	this.updating = false;
  	this.abort = function() {
   		if (that.updating) {
      		that.updating=false;
      		that.AJAX.abort();
      		that.AJAX=null;
    	}
  	}
  	
	this.update = function(passData,postMethod) { 
    	if (that.updating) { 
    		return false;
    	}
    	that.AJAX = null;                          
   		if (window.XMLHttpRequest) {              
     			that.AJAX=new XMLHttpRequest();              
   		} else {
   				try {                                  
     				that.AJAX=new ActiveXObject("Microsoft.XMLHTTP");
     			}catch (err2) {
     				that.AJAX=new ActiveXObject("Msxml2.XMLHTTP");
     			}
   		}                                             
   		if (that.AJAX==null) {                             
     			return false;                               
   		} else {
     		that.AJAX.onreadystatechange = function() {  
	       		if (that.AJAX.readyState==4) {
					try{
						var ar=eval('(' + that.AJAX.responseText + ')');
						if(ar['error'] && ar['error']=='Your Session is expired, Please login again.'){
							alert(ar['error']);
						    onSessionError();
							return;
						}
					}catch(error){}
         			that.updating=false;                
         			that.callback(that.AJAX.responseText,that.AJAX.status,that.AJAX.responseXML);        
         			that.AJAX=null;                                         
    	   		}                                                      
     		}
	   		that.updating = new Date();
			if (/post/i.test(postMethod)) {
	       		var uri=urlCall+'?rand='+that.updating.getTime();
		        that.AJAX.open("POST", uri, true);
	       		that.AJAX.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
		        that.AJAX.setRequestHeader("Content-Length", passData.length);
				that.AJAX.setRequestHeader("From","true");
				that.AJAX.send(passData);
			} else {
				var uri=urlCall+'?'+passData+'&timestamp='+(that.updating.getTime()); 
				that.AJAX.setRequestHeader("From","true");
			    that.AJAX.open("GET", uri, true);                             
		        that.AJAX.send(null);                                         
			}              
			return true;                                             
		}                                                                           
  	}
	var urlCall = url;        
  	this.callback = callbackFunction || function () { };
}

function commonSearch(action,field,code,description,dispatch,errordiv,func,addParm,errorFuntion) {
	if (document.getElementById(code).value!=''){ //if input is blank, igone the ajax call	
		if(addParm!=undefined && addParm!='')
			postData="dispatch="+dispatch+"&code="+escape(document.getElementById(code).value)+addParm;
		else 
			postData="dispatch="+dispatch+"&code="+escape(document.getElementById(code).value);
		var mySearchRequest = new ajaxObject(action);
		mySearchRequest.callback = function(responseText, responseStatus, responseXML) {
			if (responseStatus==200) {
				var message =  eval('(' + responseText + ')');
				document.getElementById(errordiv).innerHTML = message.error;
				document.getElementById(field).value		= message.id;			
				document.getElementById(description).value  = message.description;
				if(message.error=='' && func!=undefined){
					func();
				}else if(errorFuntion!=undefined && errorFuntion!=null && message.error!=''){
					errorFuntion();
				}
			}
		}
		mySearchRequest.update(postData,'POST');
	}else{
		document.getElementById(description).value  = '';
		document.getElementById(field).value  = '';
		if(errorFuntion!=undefined && errorFuntion!=null){
			errorFuntion();
		}
	}
}	

function loadPopup(url,width,height){
	var theTop=(screen.height/2)-(height/2);
	var theLeft=(screen.width/2)-(width/2);
	var features='height='+height+',width='+width+',top='+theTop+',left='+theLeft+",dialog=yes,modal=yes,status=yes,scrollbars=no";
	var win=window.open('DocumentViewer.jsp?url='+escape(url)+"&height="+escape(height)+"&width="+escape(width),"documentViewer",features);
}

function onSessionError(){
    if(window.opener!=null && window.opener!=undefined){
        setTimeout('window.opener.onSessionError()',1);
        setTimeout('window.close()',10);
    }else if(window.parent!=null && window.parent!=undefined && window.parent.opener!=null && window.parent.opener!=undefined){ 
        setTimeout('window.parent.opener.onSessionError()',1);
        setTimeout('window.parent.close()',10);
    }else{
        window.location.reload(true);
    }
}