function popupWindows()
{ 
	if(!document.getElementsByTagName)
	{ 
		return; 
	} 
	var scrW = screen.availWidth; 
	var scrH = screen.availHeight; 
	var anchors = document.getElementsByTagName("a"); 
	for (var i = 0; i < anchors.length; i++)
	{ 
		var anchor = anchors[i]; 
		var linkDest = anchor.getAttribute("href"); 
		var relIndex = anchor.getAttribute("rel"); 
		var relSplit = relIndex.split("|"); 
		var windowAttributes = ""; 
		if(relSplit[0] == "popup")
		{ 
			if (relSplit[1] > scrW)
			{ 
				pW = scrW - 10; 
			} 
			else
			{ 
				pW = relSplit[1]; 
			} 
			if (relSplit[2] > scrH)
			{ 
				pH = scrH - 40; 
			} 
			else
			{ 
				pH = relSplit[2]; 
			} 
			scrX = (scrW - pW - 10) * .5; 
			scrY = (scrH - pH - 30) * .5; 
			var windowAttributes = "width=" + pW + ",height=" + pH + ",left=" + scrX + ",top=" + scrY + ",screenX=" + scrX + ",screenY=" + scrY; 
			windowAttributes += ",location=" + relSplit[4] + ",resizable=" + relSplit[4] + ",scrollbars=" + relSplit[4]; 
			anchor.setAttribute("href", "javascript:popupWin('" + linkDest + "','" + windowAttributes + "')"); 
		} 
	} 
} 

//link like that : <a href="http://www.ZoneB.org/" rel="popup|600|400|0|1">ZoneB.org Network</a>