var scaleby = 0.9;

function GetHeight() {
       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;
}


function resize() {
	
	if(GetHeight() < 620) {
		var images = document.getElementById('content-photos').getElementsByTagName('img');
		for(i=0;i<=images.length;i=i+1) {
			images[i].height = images[i].height * scaleby;
		}
	}

}