Conflicting Javascripts - Help Please

/*--------------------------------------------------
	Center Object
--------------------------------------------------*/
<!--
function getWindowHeight() {
	var windowHeight = 0;
	if (typeof(window.innerHeight) == 'number') {
		windowHeight = window.innerHeight;
	}
	else {
		if (document.documentElement && document.documentElement.clientHeight) {
			windowHeight = document.documentElement.clientHeight;
		}
		else {
			if (document.body && document.body.clientHeight) {
				windowHeight = document.body.clientHeight;
			}
		}
	}
	return windowHeight;
}
function setContent() {
	if (document.getElementById) {
		var windowHeight = getWindowHeight();
		if (windowHeight > 0) {
			var contentElement = document.getElementById('content');
			//var contentHeight = contentElement.offsetHeight;
			var contentHeight =
				document.getElementById('header').offsetHeight +
				document.getElementById('info').offsetHeight +
				document.getElementById('footer').offsetHeight; 
			if (windowHeight - contentHeight > 0) {
				contentElement.style.position = 'relative';
				contentElement.style.top = ((windowHeight / 2) - (contentHeight / 2)) + 'px';
			
			//rules for IE Mac
				
			if(navigator.appVersion.indexOf("MSIE") != -1){var IE = true}else{ var IE = false;}
			if(navigator.appVersion.toLowerCase().indexOf("mac") != -1){var Mac = true}else{ var Mac = false;}
			
			if(Mac && IE) {
				//get the height of header
				var headH = document.getElementById('header').offsetHeight;
				//set position of INFO based on that height
				document.getElementById('info').style.position = 'absolute';
				document.getElementById('info').style.top = headH +'px';
			
				//get the height of INFO
				var infoH = document.getElementById('info').offsetHeight;
				//set position of Footer based on that height
				document.getElementById('footer').style.position = 'absolute';
				document.getElementById('footer').style.top = (infoH + headH)  +'px';
			}
			}
			else {
				contentElement.style.position = 'static';
			}
		}
	}
}
/*--------------------------------------------------
	Toggle Object
--------------------------------------------------*/
<!--
init = function () {
	var table = document.getElementsByTagName("table");
	for (var i=0; i<20; i++) {
		var caption = table[i].getElementsByTagName("caption");
		caption[0].thead = table[i].getElementsByTagName("thead");
		caption[0].tbody = table[i].getElementsByTagName("tbody");
		// hide thead and tbody
		caption[0].thead[0].style.display = 'table-header-group';
		caption[0].tbody[0].style.display = 'table-header-group';
		caption[0].onclick = function () {
			this.thead[0].style.display = this.thead[0].style.display == 'none' ? '' : 'none';
			this.tbody[0].style.display = this.tbody[0].style.display == 'none' ? '' : 'none';
			setContent();
		} 
	}
}
window.onload = function() {
	init();
	setContent();
}
window.onresize = function() {
	setContent();
}
//-->