var objA=document.getElementsByTagName("a");
var i,max;
for(i=0,max=objA.length;i<max;i++){
objA[i].onclick=function(){
alert(this.innerHTML);
}

}

var person={name:'wmhello',age:'28'};
var tips=''; for(var obj in person){
tips+=obj+'-->'+person[obj]+'/n'

}

alert(tips)

var num=[1,3,5];
var total=0;
num.forEach(function(e){
total+=e;
});
alert(total);