var myWidth = screen.availWidth;
var myHeight = screen.availHeight;

function accessCSS(layerID){	// access a layer's CSS property in all browsers
	if(document.getElementById){
		return document.getElementById(layerID).style;
	}else if(document.all){
		return document.all[layerID].style;
	}else if(document.layers){
		return document.layers[layerID];
	}
}

function myWarn() {

	alert("Under Construction");

}

function myLogon() {

	alert("Please enter correct User Name and Password");

}

function colourLayer(layerID) {
	accessCSS(layerID).backgroundColor = "#ffffcc";
}

function deColourLayer(layerID) {
	accessCSS(layerID).backgroundColor = "";
}

var detailsWindow;

function openPage(pgAddress,wind,specs)
{
	detailsWindow = window.open(pgAddress,wind,specs);
	detailsWindow.focus();
	return false;
}