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execute onLoad only once in an ASP page

rastafaray asked
Last Modified: 2012-05-09
looking for a way to execute onLoad for the BODY tag only once in an ASP page.  see below:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">

Set fso = CreateObject("Scripting.FileSystemObject") 
If (fso.FileExists("C:\inetpub\message.txt"))=true then
	onLoadString = "document.getElementById('light').style.display='block';document.getElementById('fade').style.display='block';"
	onLoadString = ""
End If
Set fso = Nothing

			display: none;
			position: absolute;
			top: 0%;
			left: 0%;
			width: 100%;
			height: 100%;
			background-color: black;
			-moz-opacity: 0.8;
			filter: alpha(opacity=80);
		.white_content {
			display: none;
			position: absolute;
			top: 25%;
			left: 25%;
			width: 50%;
			height: 50%;
			padding: 16px;
			border: 1px solid black;
			background-color: white;
			overflow: auto;

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<body onLoad="<%=onLoadString%>">

<div id="light" class="white_content"><iframe frameborder="0" src="http://www.domain.com/message.txt" width="100%" height="300">
</iframe> <a href = "javascript:void(0)" onclick = "document.getElementById('light').style.display='none';document.getElementById('fade').style.display='none'">Close</a></div>
<div id="fade" class="black_overlay"></div>


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