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Hi all. I have built a button widget that I
use on the following site - www.arrayx.co.uk/problem_test
The widget is used in the left-hand pane, to
display the dates, the days and the months. The strange thing is, when the page
loads initially, all is fine. The mouse over images are all pre-loaded and work
as intended. However, if you press the button 'Search the Listings', then click
on 'Add New Event' at the top of the page, then close the window that this
opens, you will find that the browser seems to have lost all the images that
were loaded in the left hand pane. If you mouseover them, the browser will fetch
both images again from the server - the onmouseover image and the
onmouseout image (which is weird seeing as though it's already being
displayed).
Can anyone help me work out what is going on here?
The code for the button widget is below...
As an aside, this is running on 2.52. Should I
delete the this.id=.. line? What about the superclass lines?
Cheers, Ben
--------------------code
start---------------------
DynLayer.prototype.setBckGrdImg=function(obj)
{
this.bgImage=obj+'.src'; if (this.css==null) return; if (is.ns4) { this.elm.background.src="obj.src; } else this.css.backgroundImage='url('+obj.src+')'; }; activeDayOn = new Image()
activeDayOn.src = " 'images/left_nav/on_01.gif' activeDayOff.src = " 'images/left_nav/off_01.gif' function
button(x,y,w,h,caption,imgOn,imgOff,month,year,date1,date2,date3,date4,date5,isDay)
{
this.superClass=DynLayer this.superClass() this.id="button"+(button.Count++) this.moveTo(x||0,y||0) this.setSize(w||0,h||0) this.caption=caption||''
if (isDay!=true) { this.imgDir='images/left_nav/' this.imgOn = new Image() this.imgOn.src="this.imgDir+imgOn this.imgOff.src="this.imgDir+imgOff this.date1=date1 this.date2=date2 this.date3=date3 this.date4=date4 this.date5=date5 this.selected=false var l=new EventListener(this) l.oncreate=function(e) { var o=e.getTarget() if (isDay) { o.setBckGrdImg(activeDayOff) } else { o.setBckGrdImg(o.imgOff) } o.dyncaption=new DynLayer(null,0,0,o.w,o.h) if (o.caption.length>2) o.caption='' o.dyncaption.setHTML('<center class=\'textSnippets\'>'+o.caption+'</center>') o.addChild(o.dyncaption) o.setVisible(true) o.dynTopLayer=new DynLayer(null,0,0,o.w,o.h) o.addChild(o.dynTopLayer) o.setVisible(true) } l. { var o = e.getTarget() if (month) { freeText = parent.frames[2].document.listing_crit.freeText.value; //split the freeText string into array elements by space freeText = freeText.split(" "); var strFreeText = ""; //construct the strFreeText string which inserts ~ where there was spaces for (x=0; x<freeText.length; x = x + 1) { if (x==freeText.length-1) { //don't append a ~ if this is the last array element strFreeText += freeText[x]; } else { strFreeText += freeText[x] + "~"; } } //delete the trailing ~ while (strFreeText.substring(strFreeText.length-1,strFreeText.length) == ' ') { strFreeText = strFreeText.substring(0, strFreeText.length-1); } //encode strFreeText in case of special characters strFreeText = escape(strFreeText); area = parent.frames[2].document.listing_crit.area.selectedIndex; category = parent.frames[2].document.listing_crit.category.selectedIndex; if (year) {
parent.navFrame.location="cl_nav.php?month="+month+"&year="+year+"&freeText="+strFreeText+"&area="+area+"&category="+category; } else { parent.navFrame.location="cl_nav.php?month="+month+"&freeText="+strFreeText+"&area="+area+"&category="+category; } } else { if (isDay) { o.selected?o.setBckGrdImg(activeDayOff):o.setBckGrdImg(activeDayOn) o.selected?o.selected=false:o.selected=true } else { o.selected?o.setBckGrdImg(o.imgOff):o.setBckGrdImg(o.imgOn) o.selected?o.selected=false:o.selected=true } //alert(o) } if (o.caption=='') { if (o.date1) { if (o.selected) { eval('myButton'+date1+'.selected=true') eval('myButton'+date1+'.setBckGrdImg(activeDayOn)') } else { eval('myButton'+date1+'.selected=false') eval('myButton'+date1+'.setBckGrdImg(activeDayOff)') } } if (o.date2) { if (o.selected) { eval('myButton'+date2+'.selected=true') eval('myButton'+date2+'.setBckGrdImg(activeDayOn)') } else { eval('myButton'+date2+'.selected=false') eval('myButton'+date2+'.setBckGrdImg(activeDayOff)') } } if (o.date3) { if (o.selected) { eval('myButton'+date3+'.selected=true') eval('myButton'+date3+'.setBckGrdImg(activeDayOn)') } else { eval('myButton'+date3+'.selected=false') eval('myButton'+date3+'.setBckGrdImg(activeDayOff)') } } if (o.date4) { if (o.selected) { eval('myButton'+date4+'.selected=true') eval('myButton'+date4+'.setBckGrdImg(activeDayOn)') } else { eval('myButton'+date4+'.selected=false') eval('myButton'+date4+'.setBckGrdImg(activeDayOff)') } } if (o.date5) { if (o.selected) { eval('myButton'+date5+'.selected=true') eval('myButton'+date5+'.setBckGrdImg(activeDayOn)') } else { eval('myButton'+date5+'.selected=false') eval('myButton'+date5+'.setBckGrdImg(activeDayOff)') } } } } l. { var o=e.getTarget() if (isDay) { o.selected?'':o.setBckGrdImg(activeDayOn) } else { o.selected?'':o.setBckGrdImg(o.imgOn) } o.css.cursor='hand' } l. { var o=e.getTarget() if (isDay) { o.selected?'':o.setBckGrdImg(activeDayOff) } else { o.selected?'':o.setBckGrdImg(o.imgOff) } //o.css.cursor='normal' } this.addEventListener(l) return this } button.Count=0 button.prototype=new DynLayer() button.prototype.getSubClass=function() { return button } ----------------code
finish-------------------------
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