IE4 = (document.all) ? 1 : 0;
NS4 = (document.layers) ? 1 : 0;
ver4 =(NS4 || IE4) ? 1 : 0;
var NS6 = (document.getElementById && !document.all) ? true : false;
isMac = (navigator.appVersion.indexOf("Mac") != -1);




//resize image heights in left and right columns according to content in middle column
function matchHeights() {
	if (IE4) {
		var x = document.all.middleColumn.clientHeight;
		var imgLeftHeight = (x - 244) + 25;
		var imgRightHeight = (x - 187 + 25);
		//alert(document.all.middleColumn.clientHeight);
		document.all.imgLeft.height = imgLeftHeight;
		document.all.imgRight.height = imgRightHeight;
	}
	else if (NS6) {
		var x = document.getElementById("middleColumn").offsetHeight;
		var imgLeftHeight = (x - 244) + 25;
		var imgRightHeight = (x - 187) + 25;
		//alert(document.getElementById("middleColumn").offsetHeight);
		document.getElementById("imgLeft").height = imgLeftHeight;
		//alert("image height = " + document.getElementById("imgLeft").height);
		document.getElementById("imgRight").height = imgRightHeight;
	}
	/*else if (NS4) {
		var x = document.middleColumn.clientHeight;
		var imgLeftHeight = (x - 244);
		var imgRightHeight = (x - 187);
		alert(document.middleColumn.offsetHeight);
		document.imgLeft.height = imgLeftHeight;
		document.imgRight.height = imgRightHeight;
	}*/
}