var minheight = 800;
var megazineHeight;

function heightmod(){
	if(navigator.userAgent.indexOf('MSIE') > -1){
		megazineHeight = document.documentElement.clientHeight;
	}
	if(navigator.userAgent.indexOf('Gecko') > -1){
		megazineHeight = window.innerHeight;
	}
	
	if(megazineHeight < minheight){
		document.getElementById("megazine").style.height = minheight+"px";
	} else {
		document.getElementById("megazine").style.height = megazineHeight+"px";
	}
}

window.onresize = heightmod;