function emailCheck (emailStr) {
	var emailPat=/^(.+)@(.+)$/
	var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
	var validChars="\[^\\s" + specialChars + "\]"
	var quotedUser="(\"[^\"]*\")"
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
	var atom=validChars + '+'
	var word="(" + atom + "|" + quotedUser + ")"
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")

	var matchArray=emailStr.match(emailPat)
	if (matchArray==null) {
		alert("Please enter a valid e-mail address (i.e., name@company.com) before submitting.")
		return false
	}

	var user=matchArray[1]
	var domain=matchArray[2]
	if (user.match(userPat)==null) {
    	alert("Please enter a valid e-mail address (i.e., name@company.com) before submitting.")
	    return false
	}

	var IPArray=domain.match(ipDomainPat)
	if (IPArray!=null) {
		for (var i=1;i<=4;i++) {
	    	if (IPArray[i]>255) {
				alert("Destination IP address is invalid!")
				return false
		    }
    	}
    	return true
	}

	var domainArray=domain.match(domainPat)
	if (domainArray==null) {
		alert("Please enter a valid e-mail address (i.e., name@company.com) before submitting.")
	    return false
	}

	var atomPat=new RegExp(atom,"g")
	var domArr=domain.match(atomPat)
	var len=domArr.length
	if (domArr[domArr.length-1].length<2 || 
    	domArr[domArr.length-1].length>3) {
	    alert("Please enter a valid e-mail address (i.e., name@company.com) before submitting.")
		return false
	}

	if (len<2) {
		var errStr="Please enter a valid e-mail address (i.e., name@company.com) before submitting."
		alert(errStr)
		return false
	}
	return true;
}
function VideoWindow(URL,w,h) {
	if( w == null ) w = 380;
	if( h == null ) h = 240;
	window.open(URL,'WIN','toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,width='+w+',height='+h);
}

function ResizeableWindow(URL,w,h) {
	if( w == null ) w = 380;
	if( h == null ) h = 240;
	window.open(URL,'WIN','toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,width='+w+',height='+h);
}