<body>
<input type="button" value="Hi" />
<input type="button" value="Hi" />
<input type="button" value="Hi" />
<input type="button" value="Hi" />
<input type="button" value="Hi" />
<script>
var inobj=document.getElementByTagName("input");
for(var i=0;i<inobj.length;i++){
inobj[i].onclick=function(){
for(var j=0;j<inobj.length;j++){
inobj[j].value="Hi";
}
this.value="Hello";
};
}
</script>
</body>