以下代碼加入<head>地區：
<script>
/*
Submit Once form validation-
?Dynamic Drive (www.dynamicdrive.com)
For full source code, usage terms, and 100's more DHTML scripts, visit http://dynamicdrive.com
*/
function submitonce(theform){
//if IE 4+ or NS 6+
if (document.all||document.getElementById){
//screen thru every element in the form, and hunt down "submit" and "reset"
for (I=0;I<theform.length;I++){
var tempobj=theform.elements[I]
if(tempobj.type.toLowerCase()=="submit"||tempobj.type.toLowerCase()=="reset")
//disable em
tempobj.disabled=true
}
}
}
</script>
以下代碼加入<body>地區：
<FORM name=form2 onsubmit="submitonce(this);return false" action=""
method=post><INPUT name=textfield> <INPUT type=submit value=提交 name=Submit> <INPUT type=reset value=重設 name=Submit2> 提示:按下提交按鈕後，看看有什麼不同？ </FORM>
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