<SCRIPT Language="JavaScript"> function weekNo() { var totalDays = 0; now = new Date(); years=now.getYear(); var days = new Array(12); // Array to hold the total days in a month days[0] = 31; days[2] = 31; days[3] = 30; days[4] = 31; days[5] = 30; days[6] = 31; days[7] = 31; days[8] = 30; days[9] = 31; days[10] = 30; days[11] = 31; // Check to see if this is a leap year if (Math.round(now.getYear()/4) == now.getYear()/4) { days[1] = 29 }else{ days[1] = 28 } // If this is January no need for any fancy calculation otherwise figure out the // total number of days to date and then determine what week if (now.getMonth() == 0) { totalDays = totalDays + now.getDate(); }else{ var curMonth = now.getMonth(); for (var count = 1; count <= curMonth; count++) { totalDays = totalDays + days[count - 1]; } totalDays = totalDays + now.getDate(); } // Here is the modification: considering when start the 1st week of year. // Originally was only: var week = Math.round(totalDays/7) // Check if browser is "Microsoft Internet Explorer" or not and apply the right var var agt=navigator.userAgent.toLowerCase(); if ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1)) { var firstday=new Date("01/01/"+String(now.getYear())).getDay(); } else { var firstday=new Date("01/01/"+String(1900+now.getYear())).getDay(); } var diff=7-firstday+1; var week = Math.round((totalDays+diff-firstday)/7); return week; } document.write("Welcome to <b>week "+weekNo()+"<\/b> of "+years+"!") // --> </SCRIPT>