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 setHeight() {
	if (document.getElementById) {
		var windowHeight = getWindowHeight();
		if (windowHeight>0) {
			var mainHeight = document.getElementById('main').offsetHeight;
			var mainElement = document.getElementById('main');
			if (windowHeight-mainHeight>=0) {
				mainElement.style.height=windowHeight+'px';
			}
		}
	}
}

window.onload = function() {
  setHeight();
  setAntiblur();
}
window.onresize = function() {
  setHeight();
}

function setAntiblur() {
	var x = document.getElementById('main');
	if (!x) return;
	var y = x.getElementsByTagName('a');
	for (var i=0;i<y.length;i++)
	y[i].onfocus = "if(this.blur)this.blur();";
}