function addLoadEvent(func){
	var oldonload = window.onload;
	if(typeof window.onload != 'function'){
		window.onload = func;
	}
	else{
		window.onload=function(){
			oldonload();
			func();
		}
	}
}
function picListTu(indexID,iList,sz){
	if(!document.getElementById) return false;
	if(!document.getElementsByTagName) return false;
	if(!document.getElementById(indexID)) return false;
	var picId=document.getElementById(indexID);
	var picLis=picId.getElementsByTagName(iList);
	for(i=0;i<picLis.length;i++){
		if((i+1)%sz==0){
			picLis[i].style.marginRight="0";
		}
	}
}
function picListDy(){
	picListTu("picList","li",3);
	picListTu("contList","li",4);
}
window.onload=addLoadEvent;
addLoadEvent(picListDy)