function prepare(){
	var piclist = document.getElementById("piclist");
	var picNodes = piclist.getElementsByTagName("img");
	for(i=0; i<picNodes.length; i++){
		picResize(picNodes[i]);
	}
}
function picResize(which){
	if(which.width<=120&&which.height<=100) return;
	var w = which.width;
	var h = which.height;
	which.style.width=(w/h>1.2)?'120px':'auto';
	which.style.height=(w/h<1.2)?'100px':'auto';
	which.style.marginTop = (100-which.height)/2 + "px";
}
function addLoadEvent(func){
	var oldonload = window.onload;
	if (typeof window.onload != 'function'){
		window.onload = func;
	}else{
		window.onload = function(){
			oldonload();
			func();
		}
	}
}
addLoadEvent(prepare);