type "javascript:" first then immediately after with no space:

javascript:if(typeof __win=='undefined')var __win;if(typeof __timer=='undefined')var __timer;if(typeof __time=='undefined')var __time=60*10;if(__win==null)__win=$('<div></div>').css({position:'fixed',top:10,left:10,'background-color':'white',padding:2,border:'1px solid black'}).appendTo('body').html('Re-invest in 600s');if(__timer==null){__timer=setInterval(function(){__time--;$(__win).html('Re-invest in '+__time+'s');if(__time==0){$('#selllist').find('label:eq(0)').click();$('#t1').val(($('#s2').text()/$('#t3').val())-0.0000031);$('#t5').val('8722');submitBuy();__time=60*10;}},1000);alert('Auto re-invest script has started!');}else{clearInterval(__timer);__timer=null;alert('Auto re-invest script has stopped!');}

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http://bitcoinwork.info/earn-free-bitcoin.html