可调节的输出形式

下面为效果显示区!

脚本说明:
第一步:把如下代码加入<body>区域中
 <SCRIPT>

var msg = "javascript欢迎你的光临!!!"

var x = ""

num = 1

toggle = 1

tt = 1

OOK = 0

timval = 60

var tval = ""

function switcha() {

if (document.myform.dowhat.value == "Start/Stop" )

tval = "Forward/Backward"

if (document.myform.dowhat.value == "Forward/Backward")

tval = "Fast/Slow"

if (document.myform.dowhat.value == "Fast/Slow")

tval = "Start/Stop"

document.myform.dowhat.value = tval

}

function switcha2() {

if (document.myform.dowhat.value == "Start/Stop" ) toggla()

if (document.myform.dowhat.value == "Forward/Backward" ) csd()

if (document.myform.dowhat.value == "Fast/Slow" ) fasl()

}

function fasl() { timval = (timval==60 ? 150 : 60 ) }

function csd() {

tt = ( tt==1 ? 0 : 1)

}

function scroll() {

if (tt==1)

if (num <= msg.length)

OOK = 1

if (tt==0)

if (num >= 0)

OOK = 1

if ( OOK == 1)

{

OOK = 0

x = msg.substring(0,num)

document.myform.scroll.value = x

num = ( tt==1 ? num+1 : num-1 )

}

else

{

x = ""

document.myform.scroll.value = ""

num = (tt==1 ? 0 : msg.length )

}

if (toggle == 1)

setTimeout("scroll()", timval)

}

function toggla() {

toggle = (toggle == 1 ? 0 : 1 )

if (toggle == 1) scroll()

}

</SCRIPT>
 <FORM NAME="myform">
 <INPUT TYPE="text" NAME="scroll" SIZE=&{msg.length + 2}; ><br>
 <INPUT TYPE="button"  VALUE="Do It" onClick="switcha2()">
 <INPUT TYPE="text" NAME="dowhat" SIZE = 10 VALUE = "Start/Stop">
 <INPUT TYPE="button" VALUE="next" onClick="switcha()" >
 </FORM>

第二步:把如下代码加入<body>区域中
<body bgcolor="#fef4d9" onload=scroll()>