function onloadEvent(func){
 var one=window.onload
 if(typeof window.onload!='function'){
  window.onload=func
 }
 else{
  window.onload=function(){
   one();
   func();
  }
 }
}
function showtable(){
 var tableid='photo_album';  //table id
 var overcolor='#b5ddd2';// hover color
 var color1='#fff';  //first color
 var color2='#fff';  //second color
 var tablename=document.getElementById(tableid)
 var tr=tablename.getElementsByTagName("tr")
for(var i=0 ;i<tr.length;i++){
  tr[i].onmouseover=function(){
 this.style.backgroundColor=overcolor;
}
  tr[i].onmouseout=function(){
   if(this.rowIndex%2==0){
    this.style.backgroundColor=color1;
   }else{
    this.style.backgroundColor=color2;
   }
  }
  if(i%2==0){
   tr[i].className="color1";
  }else{
   tr[i].className="color2";
  }
 }
}
onloadEvent(showtable);