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M.J
Posts: 2 Joined: 5/18/2005 Status: offline
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'(object reference)' is null or not an object - 5/18/2005 10:54:21
hi i am using a code to view some pictures .. and it work fine with me .. but.. when i use the same code to view an other set of pictures this error appears : '(tdiv.style.left)' is null or not an object how can i prevent that error .. i want to use that code more than once in my page can u help me plz ? ************************************ i took my code from this link: http://www.dynamicdrive.com/dynamicindex14/leftrightslide2.htm ************************************ code: <script language="JavaScript1.2"> /* Left-Right image slideshow Script- By Dynamic Drive (www.dynamicdrive.com) For full source code, terms of use, and 100's more scripts, visit http://dynamicdrive.com */ ///////configure the below four variables to change the style of the slider/////// //set the scrollerwidth and scrollerheight to the width/height of the LARGEST image in your slideshow! var scrollerwidth='100px' var scrollerheight='106px' var scrollerbgcolor='white' //3000 miliseconds=3 seconds var pausebetweenimages=3000 //configure the below variable to change the images used in the slideshow. If you wish the images to be clickable, simply wrap the images with the appropriate <a> tag var slideimages=new Array() slideimages[0]='<a href="http://www.cnn.com"><img src="PE01805A.gif" border=0"></a>' slideimages[1]='<img src="PE01803A.gif">' slideimages[2]='<img src="TN00411A.gif">' slideimages[3]='<img src="PE02054A.gif">' slideimages[4]='<img src="cake.gif">' //extend this list ///////Do not edit pass this line/////////////////////// var ie=document.all var dom=document.getElementById if (slideimages.length>1) i=2 else i=0 function move1(whichlayer){ tlayer=eval(whichlayer) if (tlayer.left>0&&tlayer.left<=5){ tlayer.left=0 setTimeout("move1(tlayer)",pausebetweenimages) setTimeout("move2(document.main.document.second)",pausebetweenimages) return } if (tlayer.left>=tlayer.document.width*-1){ tlayer.left-=5 setTimeout("move1(tlayer)",50) } else{ tlayer.left=parseInt(scrollerwidth)+5 tlayer.document.write(slideimages) tlayer.document.close() if (i==slideimages.length-1) i=0 else i++ } } function move2(whichlayer){ tlayer2=eval(whichlayer) if (tlayer2.left>0&&tlayer2.left<=5){ tlayer2.left=0 setTimeout("move2(tlayer2)",pausebetweenimages) setTimeout("move1(document.main.document.first)",pausebetweenimages) return } if (tlayer2.left>=tlayer2.document.width*-1){ tlayer2.left-=5 setTimeout("move2(tlayer2)",50) } else{ tlayer2.left=parseInt(scrollerwidth)+5 tlayer2.document.write(slideimages) tlayer2.document.close() if (i==slideimages.length-1) i=0 else i++ } } function move3(whichdiv){ tdiv=eval(whichdiv) if (parseInt(tdiv.style.left)>0&&parseInt(tdiv.style.left)<=5){ tdiv.style.left=0+"px" setTimeout("move3(tdiv)",pausebetweenimages) setTimeout("move4(scrollerdiv2)",pausebetweenimages) return } if (parseInt(tdiv.style.left)>=tdiv.offsetWidth*-1){ tdiv.style.left=parseInt(tdiv.style.left)-5+"px" setTimeout("move3(tdiv)",50) } else{ tdiv.style.left=scrollerwidth tdiv.innerHTML=slideimages if (i==slideimages.length-1) i=0 else i++ } } function move4(whichdiv){ tdiv2=eval(whichdiv) if (parseInt(tdiv2.style.left)>0&&parseInt(tdiv2.style.left)<=5){ tdiv2.style.left=0+"px" setTimeout("move4(tdiv2)",pausebetweenimages) setTimeout("move3(scrollerdiv1)",pausebetweenimages) return } if (parseInt(tdiv2.style.left)>=tdiv2.offsetWidth*-1){ tdiv2.style.left=parseInt(tdiv2.style.left)-5+"px" setTimeout("move4(scrollerdiv2)",50) } else{ tdiv2.style.left=scrollerwidth tdiv2.innerHTML=slideimages if (i==slideimages.length-1) i=0 else i++ } } function startscroll(){ if (ie||dom){ scrollerdiv1=ie? first2 : document.getElementById("first2") scrollerdiv2=ie? second2 : document.getElementById("second2") move3(scrollerdiv1) scrollerdiv2.style.left=scrollerwidth } else if (document.layers){ document.main.visibility='show' move1(document.main.document.first) document.main.document.second.left=parseInt(scrollerwidth)+5 document.main.document.second.visibility='show' } } window.onload=startscroll </script> <ilayer id="main" width=&{scrollerwidth}; height=&{scrollerheight}; bgColor=&{scrollerbgcolor}; visibility=hide> <layer id="first" left=1 top=0 width=&{scrollerwidth}; > <script language="JavaScript1.2"> if (document.layers) document.write(slideimages[0]) </script> </layer> <layer id="second" left=0 top=0 width=&{scrollerwidth}; visibility=hide> <script language="JavaScript1.2"> if (document.layers) document.write(slideimages[1]) </script> </layer> </ilayer> <script language="JavaScript1.2"> if (ie||dom){ document.writeln('<div id="main2" style="position:relative;width:'+scrollerwidth+';height:'+scrollerheight+';overflow:hidden;background-color:'+scrollerbgcolor+'">') document.writeln('<div style="position:absolute;width:'+scrollerwidth+';height:'+scrollerheight+';clip:rect(0 '+scrollerwidth+' '+scrollerheight+' 0);left:0px;top:0px">') document.writeln('<div id="first2" style="position:absolute;width:'+scrollerwidth+';left:1px;top:0px;">') document.write(slideimages[0]) document.writeln('</div>') document.writeln('<div id="second2" style="position:absolute;width:'+scrollerwidth+';left:0px;top:0px">') document.write(slideimages[1]) document.writeln('</div>') document.writeln('</div>') document.writeln('</div>') } </script> <p align="center"><font face="Arial" size="-2">Free DHTML scripts provided by<br> <a href="http://dynamicdrive.com">Dynamic Drive</a></font></p>
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kevin3442
Posts: 197 Joined: 1/25/2005 From: Nebraska, USA (home of the once-mighty Huskers) Status: offline
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RE: '(object reference)' is null or not an object - 5/18/2005 12:25:16
Just looking at the js code won't necessarily help us tell you why it works in one place but not another. Offhand, I'd say that it might be because the page where it doesn't work doesn't have a div named "tdiv". But that's just a guess. It'll be easier to diagnose the problem if we can see it in action. Can you please post a url to your site, or a page where this is happening? Kevin
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M.J
Posts: 2 Joined: 5/18/2005 Status: offline
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RE: '(object reference)' is null or not an object - 5/19/2005 5:42:13
i hope that u can download these 2 file page.zip (the code working fine) error.zip (after dupilcating the code i got the error)
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