// JScript File

function GetSize(file){
var fso=new ActiveXObject("Scripting.FileSystemObject");
var f=fso.getFile(file);
return fso.getFile(file).size;
}

function checkFileSize(ctrl){
//check if file size is > 1 MB
if(GetSize(ctrl.value)>1048576)//1 MB=1048576 B
    {
    alert('Sorry, file size > 1MB. Please use a smaller image.');
    // ctrl.form.reset();//file grater than 1MB then reset form
    }
    else
    {
    alert('File size is OK.');
    }
}