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I don't know anything at all about JavaScript. Right now I wish I did.
I have a scrolling area powered by JS. Without the doctype definition, it works in all browser I've tried, both on Mac and PC.
But when I add the doctype definition, it fails in Mozilla FireFox.
If I don't remember wrong, I'm not allowed to post a URI to the page in question, so here's the various instances of code:
Here's the JS:
function verifyCompatibleBrowser(){
this.ver=navigator.appVersion
this.dom=document.getElementById?1:0
this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0;
this.ie4=(document.all &&!this.dom)?1:0;
this.ns5=(this.dom && parseInt(this.ver) >= 5)?1:0;
this.ns4=(document.layers &&!this.dom)?1:0;
this.bw=(this.ie5 ¦¦ this.ie4 ¦¦ this.ns4 ¦¦ this.ns5)
return this
}
bw=new verifyCompatibleBrowser()
var speed=30
var loop, timer
function ConstructObject(obj,nest){
nest=(!nest)? '':'document.'+nest+'.'
this.el=bw.dom?document.getElementById(obj):bw.ie4?document.all[obj]:bw.ns4?eval(nest+'document.'+obj):0;
this.css=bw.dom?document.getElementById(obj).style:bw.ie4?document.all[obj].style:bw.ns4?eval(nest+'document.'+obj):0;
this.scrollHeight=bw.ns4?this.css.document.height:this.el.offsetHeight
this.clipHeight=bw.ns4?this.css.clip.height:this.el.offsetHeight
this.up=MoveAreaUp;this.down=MoveAreaDown;
this.MoveArea=MoveArea; this.x; this.y;
this.obj = obj + "Object"
eval(this.obj + "=this")
return this
}
function MoveArea(x,y){
this.x=x;this.y=y
this.css.left=this.x
this.css.top=this.y
}
function MoveAreaDown(move){
if(this.y>-this.scrollHeight+objContainer.clipHeight){
this.MoveArea(0,this.y-move)
if(loop) setTimeout(this.obj+".down("+move+")",speed)
}
}
function MoveAreaUp(move){
if(this.y<0){
this.MoveArea(0,this.y-move)
if(loop) setTimeout(this.obj+".up("+move+")",speed)
}
}
function PerformScroll(speed){
if(initialised){
loop=true;
if(speed>0) objScroller.down(speed)
else objScroller.up(speed)
}
}
function CeaseScroll(){
loop=false
if(timer) clearTimeout(timer)
}
var initialised;
function InitialiseScrollableArea(){
objContainer=new ConstructObject('divContainer')
objScroller=new ConstructObject('divContent','divContainer')
objScroller.MoveArea(0,0)
objContainer.css.visibility='visible'
initialised=true;
}
----------------------------------
Here's the body tag:
<body onload="InitialiseScrollableArea()">
--------------------------------
And here are the triggers:
<div id="divUpControl"><a href="javascript:;" onfocus="if(this.blur)this.blur()" onmousedown="PerformScroll(-7)" onmouseup="CeaseScroll()">scroll up</a></div>
<div id="divDownControl"><a href="javascript:;"
onfocus="if(this.blur)this.blur()" onmousedown="PerformScroll(7)" onmouseup="CeaseScroll()">scroll down</a></div>
------------------------
Can anyone suggest a solution to make it run as smooth crossbrowser?
TIA
Dan
I've tried 4.01 transitional - with and without the URI to W3C. And also XHTML 1.0.
No go. Only works in quirk's mode.
BTW: The JS is in an external file. The link looks:
<script type="text/javascript" src="scripts/marketing.js"></script>
I think I have narrowed down the reasons:
It seems to work OK if placed in the head of the document - not in an external file....
