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【例4-1】网页中文字上下滚动循环显示。 <html> <ttfe文字上下滚动循环显示<tite <metahttp-equiv="content-type"content="Text/html;charset=gb2312> <script language=JavaScript> var messages=new Array messages[O\="< font color=#8000FF>欢迎使用本书学习<ont></a> messages\[l]="< font color=HB2500>这里有织网梦工厂<font></a" messages2]="< font color==HFF06F>是网页初学者的最佳选择<font></a> messages\3]="< font color=#00000这里有…………有精彩的内容等着你<font><a> var scrollerwidth=320 var scrollerheight=100 var scrollerbgcolor=#FFFFFF 1=2 function movel(whichlayer)i thayer=eval(whichlayer) if (layer top>0&&layer, top<=5)4 set Timeout("movel(layer),3000) set Timeout("move2(document. main document. second), 3000 eturn: if (layer top>=layer document. height*-1)( setTimeout("movel(tlayer)", 100); thayer. document. write( messages\) thayer. document. close if (i=messages. length-1) else i++}} function move2(whichlayer)i thayer 2=eval( whichlayer) if(layer 2. top>0&&layer 2. top<=5 set Timeout("movel(document. main document first), 3000) retu if (layer 2. top>=layer 2. document. height*-1)(【例 4-1】网页中文字上下滚动循环显示。 <html> <head> <title>文字上下滚动循环显示</title> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <script language=JavaScript> var messages=new Array() messages\[0\]="<font color=#8000FF>欢迎使用本书学习</font></a>" messages\[1\]="<font color=#FB2500>这里有织网梦工厂</font></a>" messages\[2\]="<font color=#FF0066F>是网页初学者的最佳选择</font></a>" messages\[3\]="<font color=#000000>这里有…………有精彩的内容等着你</font></a>" var scrollerwidth=320 var scrollerheight=100 var scrollerbgcolor=′#FFFFFF′ if (messages.length>1) i=2 else i=0 function move1(whichlayer){ tlayer=eval(whichlayer) if (tlayer.top>0&&tlayer.top<=5){ tlayer.top=0 setTimeout("move1(tlayer)",3000) setTimeout("move2(document.main.document.second)",3000) return} if (tlayer.top>=tlayer.document.height*-1){ tlayer.top-=5 setTimeout("move1(tlayer)",100)} else{ tlayer.top=scrollerheight tlayer.document.write(messages\[i\]) tlayer.document.close() if (i==messages.length-1) i=0 else i++}} function move2(whichlayer){ tlayer2=eval(whichlayer) if (tlayer2.top>0&&tlayer2.top<=5){ tlayer2.top=0 setTimeout("move2(tlayer2)",3000) setTimeout("move1(document.main.document.first)",3000) return} if (tlayer2.top>=tlayer2.document.height*-1){