window.onresize=ajustar
function ajustar()
{
	var myWidth = 0, myHeight = 0;
	if( typeof( window.innerWidth ) == 'number' ){
		//Non-IE
		myWidth = window.innerWidth;
		myHeight = window.innerHeight;
	} else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ){
		//IE 6+ in 'standards compliant mode'
		myWidth = document.documentElement.clientWidth;
		myHeight = document.documentElement.clientHeight;
	} else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
		//IE 4 compatible
		myWidth = document.body.clientWidth;
		myHeight = document.body.clientHeight;
	}

	document.getElementById('concep').style.top=((myHeight-130)/2);
	document.getElementById('concep').style.left=(myWidth-300)/2;
	document.getElementById('concep').style.backgroundColor='#ffffff';
	document.getElementById('divtotal').style.width=screen.width;
	document.getElementById('divtotal').style.height=2000;
	document.getElementById('iifff').style.left=(myWidth-300)/2;
	document.getElementById('iifff').style.top=document.getElementById('concep').style.top;
	document.getElementById('divtotal').style.width=screen.width;
}
//ajustar()
function alertSize() {
  window.alert( 'Width = ' + myWidth );
  window.alert( 'Height = ' + myHeight );
}