var ddequalcolumns=new Object()
ddequalcolumns.columnswatch=["left-column", "center-column", "right-column"]

ddequalcolumns.setHeights = function(reset) {
	var tallest=0
	var resetit = (typeof reset == "string") ? true : false
	for(var i = 0; i < this.columnswatch.length; i++) {
		if(document.getElementById(this.columnswatch[i]) != null) {
			if(resetit)
				document.getElementById(this.columnswatch[i]).style.height="auto"
			if(document.getElementById(this.columnswatch[i]).offsetHeight > tallest)
				tallest = document.getElementById(this.columnswatch[i]).offsetHeight
		}
	}
	if(tallest > 0) {
		for(var i = 0; i < this.columnswatch.length; i++) {
			if(document.getElementById(this.columnswatch[i]) != null)
				document.getElementById(this.columnswatch[i]).style.height = tallest - 20 + "px"
		}
	}
}
ddequalcolumns.resetHeights = function() {
	this.setHeights("reset")
}
ddequalcolumns.dotask = function(target, functionref, tasktype) {
	var tasktype = (window.addEventListener) ? tasktype : "on" + tasktype
	if(target.addEventListener)
		target.addEventListener(tasktype, functionref, false)
	else if(target.attachEvent)
		target.attachEvent(tasktype, functionref)
}
ddequalcolumns.dotask(window, function() { ddequalcolumns.setHeights() }, "load")
ddequalcolumns.dotask(window, function() {
	if(typeof ddequalcolumns.timer != "undefined")
		clearTimeout(ddequalcolumns.timer);
	ddequalcolumns.timer = setTimeout("ddequalcolumns.resetHeights()", 200)
}, "resize")