How can i make a callout(automatically) on VF page load?

Hi suraj,

Method 1:

<script type = "text/javascript">
window.onload=function()
{
alert("Hi");
};
</script>

Method 2:

Visuaforce page:

<apex:page action="{!onLoad}">

</apex:page>

Controller:

public class sample {
public sample(){
}

public void onLoad(){
..................
..................
}
}

Thanks.