function centerIt(openUrl,wSize,hSize,features){
   var leftSide = (screen.width-wSize)/2;
   var upSide = (screen.height-hSize)/2;
   window.open(openUrl,'center',+''+features +', width='+wSize+',height='+hSize+',left='+leftSide+',top='+upSide+'');
}

function MACTest()
{
	var strPlatform = new String( navigator.platform );
	
	var ua = navigator.userAgent.toLowerCase(); 
	isIE   = (ua.indexOf('msie')!= -1 && !this.isOpera && (ua.indexOf('webtv') == -1) );

	return (strPlatform.toLowerCase().indexOf( "mac" ) != -1 && isIE);
}