function selectPurchase(LID)

{

var e = document.getElementById('purchase_table');

for(i = 0; i < ((e.rows.length - 1) / 2); i++){

var t = i + 1;

document.getElementById('LID' + t + 'o').className = '';

document.getElementById('LID' + t + 'e').className = '';

}

document.getElementById('LID' + LID + 'o').className = 'purchase_selected';

document.getElementById('LID' + LID + 'e').className = 'purchase_selected';

CurrentLID = LID;

document.getElementById("btnProceed").disabled = false;

}