function getHeight() { //Determines the height of the browser window.
        var y = 0;
        if (self.innerHeight) {
        	y = self.innerHeight;
        }
        else if (document.documentElement && document.documentElement.clientHeight) {
        	y = document.documentElement.clientHeight;
        }
        else if (document.body) {
        	y = document.body.clientHeight;
        }
        return y;
}
var theDiv=document.getElementById("contentPrimary");

if (theDiv){
	var height = theDiv.offsetHeight;
	var offset=225;
	if (getHeight()-offset > height){
		document.getElementById("contentPrimary").style.height=(getHeight()-offset)+'px';
	}
}