limpiar codigo de upload, dejar lo esencial y manipularlo

[catpaw]

y el archivo js que hace todo el rollo del upload es este:

Código:

var flashVer=-1;
if(navigator.plugins!=null&&navigator.plugins.length>0){
	if(navigator.plugins["Shockwave Flash 2.0"]||navigator.plugins["Shockwave Flash"]){
		var swVer2=navigator.plugins["Shockwave Flash 2.0"]?" 2.0":"";
		var flashDescription=navigator.plugins["Shockwave Flash"+swVer2].description;
		var descArray=flashDescription.split(" ");
		var tempArrayMajor=descArray[2].split(".");
		var versionMajor=tempArrayMajor[0];
		var versionMinor=tempArrayMajor[1];
		var versionRevision=descArray[3];
		if(versionRevision==""){
			versionRevision=descArray[4]
		}
		if(versionRevision[0]=="d"){
			versionRevision=versionRevision.substring(1)
		}
		else{
			if(versionRevision[0]=="r"){
				ersionRevision=versionRevision.substring(1);
				if(versionRevision.indexOf("d")>0){
					versionRevision=versionRevision.substring(0,versionRevision.indexOf("d"))
				}
			}
		}
		var flashVer=versionMajor+"."+versionMinor+"."+versionRevision
	}
}
else{
	if($.browser.msie){
		var version;
		var axo;
		var e;
		try{
			axo=new ActiveXObject("ShockwaveFlash.ShockwaveFlash.7");
			version=axo.GetVariable("$version")
		}
		catch(e){}
		flashVer=version.replace("WIN ","").replace(",",".")
	}
}
flashVer=flashVer.split(".")[0];

if(jQuery){
	(function(a){a.extend(a.fn,{fileUpload:function(b){
	if(flashVer>=9){
		a(this).each(function(){settings=a.extend({
			uploader:"uploader.swf",
			script:"uploader.php",
			folder:"",
			height:30,
			width:110,
			cancelImg:"cancel.png",
			wmode:"opaque",
			scriptAccess:"sameDomain",
			fileDataName:"Filedata",
			displayData:"percentage",
			onInit:function(){},
			onSelect:function(){},
			onCheck:function(){},
			onCancel:function(){},
			onError:function(){},
			onProgress:function(){},
			onComplete:function(){}
		},b);
		var d=location.pathname;
		d=d.split("/");
		d.pop();
		d=d.join("/")+"/";var f="&pagepath="+d;
		if(settings.buttonImg){
			f+="&buttonImg="+escape(settings.buttonImg)
		}
		if(settings.buttonText){
			f+="&buttonText="+escape(settings.buttonText)
		}
		if(settings.rollover){
			f+="&rollover=true"
		}
		f+="&script="+settings.script;
		f+="&folder="+escape(settings.folder);
		if(settings.scriptData){
			var g="";
			for(var c in settings.scriptData){
				g+="&"+c+"="+settings.scriptData[c]
			}
			f+="&scriptData="+escape(g)
		}
		f+="&btnWidth="+settings.width;
		f+="&btnHeight="+settings.height;
		f+="&wmode="+settings.wmode;
		if(settings.hideButton){
			f+="&hideButton=true"
		}
		if(settings.fileDesc){
			f+="&fileDesc="+settings.fileDesc+"&fileExt="+settings.fileExt
		}
		if(settings.multi){
			f+="&multi=true"
		}
		if(settings.auto){
			f+="&auto=true"
		}
		if(settings.sizeLimit){
			f+="&sizeLimit="+settings.sizeLimit
		}
		if(settings.simUploadLimit){
			f+="&simUploadLimit="+settings.simUploadLimit
		}
		if(settings.checkScript){
			f+="&checkScript="+settings.checkScript
		}
		if(settings.fileDataName){
			f+="&fileDataName="+settings.fileDataName
		}
		if(a.browser.msie){
			flashElement='<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="'+settings.width+'" height="'+settings.height+'" id="'+a(this).attr("id")+'Uploader" class="fileUploaderBtn"><param name="movie" value="'+settings.uploader+"?fileUploadID="+a(this).attr("id")+f+'" /><param name="quality" value="high" /><param name="wmode" value="'+settings.wmode+'" /><param name="allowScriptAccess" value="'+settings.scriptAccess+'"><param name="swfversion" value="9.0.0.0" /></object>'
		} 
		else{
			flashElement='<embed src="'+settings.uploader+"?fileUploadID="+a(this).attr("id")+f+'" quality="high" width="'+settings.width+'" height="'+settings.height+'" id="'+a(this).attr("id")+'Uploader" class="fileUploaderBtn" name="'+a(this).attr("id")+'Uploader" allowScriptAccess="'+settings.scriptAccess+'" wmode="'+settings.wmode+'" type="application/x-shockwave-flash" />'
		}
		if(settings.onInit()!==false){
			a(this).css("display","none");
			if(a.browser.msie){
				a(this).after('<div id="'+a(this).attr("id")+'Uploader"></div>');
				document.getElementById(a(this).attr("id")+"Uploader").outerHTML=flashElement
			}
			else{
				a(this).after(flashElement)
			}
			a("#"+a(this).attr("id")+"Uploader").after('<div id="'+a(this).attr("id")+'Queue" class="fileUploadQueue"></div>')
		}
		a(this).bind("rfuSelect",{
			action:settings.onSelect},
			function(j,h,i){
				if(j.data.action(j,h,i)!==false){
					var k=Math.round(i.size/1024*100)*0.01;
					var l="KB";
					if(k>1000){
						k=Math.round(k*0.001*100)*0.01;
						l="MB"
					}
					var m=k.toString().split(".");
					if(m.length>1){
						k=m[0]+"."+m[1].substr(0,2)
					}
					else{
						k=m[0]
					}
					if(i.name.length>20){
						fileName=i.name.substr(0,20)+"..."
					}
					else{
						fileName=i.name}a("#"+a(this).attr("id")+"Queue").append('<div id="'+a(this).attr("id")+h+'" class="fileUploadQueueItem"><div class="cancel"><a href="javascript:$(\'#'+a(this).attr("id")+"').fileUploadCancel('"+h+'\')"><img src="'+settings.cancelImg+'" border="0" /></a></div><span class="fileName">'+fileName+" ("+k+l+')</span><span class="percentage">&nbsp;</span><div class="fileUploadProgress" style="width: 100%;"><div id="'+a(this).attr("id")+h+'ProgressBar" class="fileUploadProgressBar" style="width: 1px; height: 3px;"></div></div></div>')
					}
			});
			if(typeof(settings.onSelectOnce)=="function"){
				a(this).bind("rfuSelectOnce",settings.onSelectOnce)
			}
			a(this).bind("rfuCheckExist",{
				action:settings.onCheck},
				function(m,l,j,k,o){
					var i=new Object();
					i.folder=d+k;
					for(var h in j){
						i[h]=j[h];
						if(o){
							var n=h
						}
					}
				a.post(l,i,function(r){
					for(var p in r){
						if(m.data.action(m,l,j,k,o)!==false){
							var q=confirm("Do you want to replace the file '"+r[p]+"'?");
							if(!q){
								document.getElementById(a(m.target).attr("id")+"Uploader").cancelFileUpload(p)
							}
						}
					}
					if(o){
						document.getElementById(a(m.target).attr("id")+"Uploader").startFileUpload(n,true)
					}
					else{
						document.getElementById(a(m.target).attr("id")+"Uploader").startFileUpload(null,true)
					}
				},"json")
			});
			a(this).bind("rfuCancel",{
				action:settings.onCancel
			},
			function(j,h,i,k){
				if(j.data.action(j,h,i,k)!==false){
					a("#"+a(this).attr("id")+h).fadeOut(250,function(){
						a("#"+a(this).attr("id")+h).remove()
					})
				}
			});
			a(this).bind("rfuClearQueue",{
				action:settings.onClearQueue
			},
			function(){
				if(event.data.action()!==false){
					a("#"+a(this).attr("id")+"Queue").contents().fadeOut(250,function(){
						a("#"+a(this).attr("id")+"Queue").empty()
					})
				}
			});
			a(this).bind("rfuError",{
				action:settings.onError
			},
			function(k,h,j,i){
				if(k.data.action(k,h,j,i)!==false){
					a("#"+a(this).attr("id")+h+" .fileName").text(i.type+" Error - "+j.name);
					a("#"+a(this).attr("id")+h).css({border:"3px solid #FBCBBC","background-color":"#FDE5DD"})
				}
			});
			a(this).bind("rfuProgress",{
				action:settings.onProgress,toDisplay:settings.displayData
			},
			function(j,h,i,k){
				if(j.data.action(j,h,i,k)!==false){
					a("#"+a(this).attr("id")+h+"ProgressBar").css("width",k.percentage+"%");
					if(j.data.toDisplay=="percentage"){
						displayData=" - "+k.percentage+"%"
					}
					if(j.data.toDisplay=="speed"){
						displayData=" - "+k.speed+"KB/s"
					}
					if(j.data.toDisplay==null){
						displayData=" "}a("#"+a(this).attr("id")+h+" .percentage").text(displayData)
					}
				});
				a(this).bind("rfuComplete",{
					action:settings.onComplete
				},
				function(k,h,j,i,l){
					if(k.data.action(k,h,j,unescape(i),l)!==false){
						a("#"+a(this).attr("id")+h).fadeOut(250,function(){
							a("#"+a(this).attr("id")+h).remove()});
							a("#"+a(this).attr("id")+h+" .percentage").text(" - Completed")}});
							if(typeof(settings.onAllComplete)=="function"){
								a(this).bind("rfuAllComplete",settings.onAllComplete)
							}
						})
					}
				},
				fileUploadSettings:function(b,c){
					a(this).each(function(){
						document.getElementById(a(this).attr("id")+"Uploader").updateSettings(b,c)
					})
				},
				fileUploadStart:function(b){
					a(this).each(function(){
						document.getElementById(a(this).attr("id")+"Uploader").startFileUpload(b,false)
					})
				},
				fileUploadCancel:function(b){
					a(this).each(function(){
						document.getElementById(a(this).attr("id")+"Uploader").cancelFileUpload(b)
					})
				},
				fileUploadClearQueue:function(){
					a(this).each(function(){
						document.getElementById(a(this).attr("id")+"Uploader").clearFileUploadQueue()
					})
				}
			})
		})(jQuery)};

Disculpen tanto codigo, pero es precisamente lo que quiero evitar, y es que si se fijan, el script pide un botón swf que la verdad a mi me estorba ya que el código se basa mucho en eso, comprueba el plugin de flash y muchas cosas, la verdad si se puede dejar a un lado lo del botón flash mejor

tambien hay que agregar dos paginas php, la imagen de cancel y el boton flash

y bueno la pregunta es como incluyo en mi codigo ajax lo siguiete:

que compruebe el tamaño maximo y peso de las imagenes, si eso esta ok que las suba, se que la linea para subir las imagenes es esta:

<a href="javascript:$('#img_up').fileUploadStart()">S ubir Archivo(s)</a>

lo trate de poner en mi ajax antes del ajax.open:

$('#img_up').fileUploadStart();

no marco error pero tampoco subio nada


les agradecería infinitamente su ayuda