// JavaScript Document

<!-- 
function elem(id) {
    if (document.getElementById != null) {
        return document.getElementById(id);
    }
    if (document.all != null) {
        return document.all[id];
    }
    if (document.layers != null) {
        return document.layers[id];
    }
    return null;
}

function height(id) {
    var e = elem(id);
    if (e) {
        return parseInt(e.offsetHeight);
    }
    return 0;
}

function windowHeight() {
    var height = 0;
    if( typeof( window.innerHeight ) == 'number' ) {
	//Non-IE
	height = window.innerHeight;
    } else if( document.documentElement && document.documentElement.clientHeight ) {
	//IE 6+ in 'standards compliant mode'
	height = document.documentElement.clientHeight;
    } else if( document.body && document.body.clientHeight ) {
	//IE 4 compatible
	height = document.body.clientHeight;                                                                                                                   }
    return parseInt(height);
}

function stretchPage() {

	var subcontent = elem("subcontent");
	var sidenav = elem("sidenav");
	var content = elem("content");
	
		
	if (height("sidenav") < height("content") ) {	
	    sidenav.style.height = height("content") + 'px';
	} else {
   	    sidenav.style.height = 768 + 'px';
	}
	
}