FML.js

var students = [];

var rows = $("tr");

for(var i = 1; i < rows.length; i++){
	students[i-1] = {};
	var row = rows[i];
	var name = (row.children[0].innerHTML+"").trim();
	students[i-1]["name"] = name.replace("&nbsp;","").replace(/\s\s+/g,' ');
	var cgpa = (row.children[3].innerHTML+"").trim();
	students[i-1]["cgpa"] = parseFloat(cgpa);
	var place = (row.children[4].innerHTML+"").trim();
	students[i-1]["place"] = place;
	var registration = (row.children[2].children[0].innerHTML+"").trim()
	students[i-1]["registration"] = registration;
}

students.sort(function(a,b){return b.cgpa - a.cgpa});

var target = /^Souradeep/i;

for(var i = 0; i < students.length; i++){
	if(students[i].name.search(target) > -1)
		console.log(i);
}