tableToExcel.js

## tableToExcel.js
function tableToExcel(p){
  var dlink=document.createElement('a');
  document.body.appendChild(dlink);
  var uri='data:application/vnd.ms-excel;base64,';
  var template='<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns="http://www.w3.org/TR/REC-html40"><head><!--[if gte mso 9]><xml><x:ExcelWorkbook><x:ExcelWorksheets><x:ExcelWorksheet><x:Name>{worksheet}</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet></x:ExcelWorksheets></x:ExcelWorkbook></xml><![endif]--><meta http-equiv="content-type" content="application/vnd.ms-excel; charset=UTF-8"></head><body><table>{table}</table></body></html>';
  var base64=function(s){return window.btoa(unescape(encodeURIComponent(s)));};
  var format=function(s,c){return s.replace(/{(\w+)}/g,function(m,p){return c[p];});};
  if(!p.table.nodeType) p.table = document.getElementById(p.table);
  var ctx = { worksheet: p.worksheet || 'Worksheet', table: p.table.innerHTML };
  dlink.href = uri + base64(format(template, ctx));
  dlink.download = p.filename;
  dlink.click();
  document.body.removeChild(dlink);
}

tableToExcel({
	table:document.getElementsById("someId"),
	worksheet:"htmlTable",
	filename:"filename.xls"
});