Not sure about betjam have not personally used it but most online do let you buy. As for juice on a comparable book would look something like this:
<!-- BET SPECIFIC ERROR SECTION --> <table id="betChart" align="center" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td colspan="3"> <table border="0" cellpadding="3" cellspacing="0" width="100%"><tbody><tr><td class="menucontainerBG"> <table border="0" cellpadding="0" cellspacing="0" width="100%"><tbody><tr height="19"><td class="betTitle" colspan="2" height="19">Straight Wager</td> <td class="betTitle" align="right" height="19" width="18">
</td> </tr> </tbody></table> </td> </tr> </tbody></table> </td> </tr> <tr> <td class="betWin" colspan="3"> Bet $<input autocomplete="off" class="fieldDimmed" maxlength="9" id="betAmount[0]" name="betCart.tickets[0].bet.betAmount" onchange="javascript:updatePotentialWin(0);" value="100.00" type="text"> to Win $<input autocomplete="off" class="fieldDimmed" maxlength="9" id="potentialWinAmount[0]" value="68.97" onchange="javascript:updateBet(0)" type="text"> </td> </tr> <tr class="titleHeader" height="15"> <td class="tableHeaderBold">Date</td> <td class="tableHeaderBold">Team</td> <td class="tableHeaderBold">Line</td> </tr> <tr> <td class="trLineThin" colspan="3">
</td> </tr> <tr class="odd"> <td class="betInfo">04/30/10</td> <td class="betInfo">Jazz (Utah)</td> <td class="betInfo">-4</td> </tr> <tr class="odd"> <td class="betInfo">22:10 ET</td> <td class="betInfo">
</td> <td class="betInfo">(-145)</td> </tr> <tr class="odd"> <td colspan="3" class="betTicketTitle">Buying (2 points)</td> </tr> <tr> <td class="trLineThin" colspan="3">
</td> </tr> <script language="javascript"> productBrandBuf.append("Bskt-Nugge-Jazz(-043010+"); </script> </tbody></table> <script language="javascript"> if (("" != "200") && ("" != productBuf.toString())) ** productBuf.append(","); productPriceBuf.append(","); productQtyBuf.append(","); productBrandBuf.append(","); productCategoryBuf.append(","); productIsSuggestedBuf.append(","); productIsRoundRobinBuf.append(","); } if("Straight Wager".match(/If/))** productBuf.append(stripIllegalChars("SportType+200+-+Straight Wager+-+1+Teams+Selected")); }else{ productBuf.append(stripIllegalChars("SportType+200+-+Straight Wager")); } productPriceBuf.append("100.0"); productQtyBuf.append("1"); productCategoryBuf.append("SportType+200"); if ("false" == 'true') ** productIsSuggestedBuf.append("SuggestedBet"); } else ** productIsSuggestedBuf.append("NonSuggestedBet"); } productIsRoundRobinBuf.append("NonRoundRobinBet"); </script> <!-- Total Bet START -->
<table class="borderLight" border="0" cellpadding="0" cellspacing="0" width="100%"><tbody><tr> <td class="betTotalsLeft" nowrap="nowrap">Your Total Bet:</td> <td class="betTotalsRight" nowrap="nowrap">100.00
</td> </tr> <tr> <td class="betTotalsLeft" nowrap="nowrap">Total Potential Win:</td> <td class="betTotalsRight" nowrap="nowrap">68.97
</td></tr></tbody></table>